How to Choose the Right Water Storage Capacity for Your Trip

When planning a backpacking or camping trip, one of the most critical decisions is how much water to carry. Carry too little, and you risk dehydration; carry too much, and you're weighed down by unnecessary ounces. The key is understanding your water storage capacity needs based on your trip's duration, group size, and available water sources. In this guide, we'll help you calculate your water needs and choose the right water storage solutions, from hydration reservoirs to collapsible water bags.

Whether you're a day hiker or a multi-day trekker, having the right water storage capacity ensures you stay hydrated without overloading your pack. We'll break down the factors to consider, provide a practical water needs calculator, and recommend specific products from Therm-a-Rest's parent brand, MSR, to meet your needs.

Factors That Determine Your Water Storage Needs

Your water storage capacity depends on several key factors. First, consider the length of your trip. A day hike typically requires 2-3 liters per person, while a multi-day expedition may require you to carry 4-6 liters at a time, especially if water sources are scarce. Second, think about your group size. More people mean more water, but you can also share larger storage containers to distribute weight.

Climate and activity level also play a significant role. In hot, dry conditions or during high-exertion activities, you may need up to 1 liter per hour. Conversely, in cooler climates with frequent stream crossings, you can carry less and filter more. Finally, consider the availability of water sources along your route. If you know there are reliable streams, you can carry less and filter as needed, but if water is scarce, you'll need to carry more.

• Trip length: day hike (2-3L), overnight (3-4L), multi-day (4-6L+ per person)
• Group size: larger groups can share bigger containers like a 6L or 10L water bag
• Climate: hot and dry increases needs; cool and wet reduces them
• Water sources: reliable streams mean you can filter more and carry less

Calculating Your Water Needs: A Simple Formula

A general rule of thumb is to plan for 0.5 to 1 liter of water per hour of activity, depending on temperature and intensity. For a moderate day hike in mild weather, 2-3 liters per person is usually sufficient. For overnight trips, you'll need additional water for cooking and cleaning, so plan for 4-5 liters per person per day. For multi-day trips, you can often resupply from natural sources, but you should always carry a minimum of 2 liters as a safety margin.

To calculate your total required capacity, multiply the number of people by the liters per day, then adjust for the longest stretch between water sources. For example, if you're a group of two on a three-day trip with water available daily, you might need 6 liters of storage per person. But if you have a 20-mile stretch without water, you'll need to carry more. Always err on the side of carrying extra capacity, even if you don't fill it completely.

• Use a water needs calculator app or simple spreadsheet to plan your trip
• Always carry at least 1 liter of emergency water beyond your calculated needs

Choosing the Right Water Storage Gear

Once you know your required capacity, you can choose the right gear. For personal hydration, hydration reservoirs like the MSR QuickDraw Reservoir are convenient, but for larger storage needs, collapsible water bags are ideal. MSR offers a range of DromLite bags in sizes from 2 to 10 liters, perfect for group trips or basecamp use. These bags are durable, lightweight, and pack down small when empty.

When selecting a water bag, consider the connection options. Some bags come with a hose or spout for easy pouring, while others are designed to attach directly to a water filter like the MSR QuickDraw Filter. For example, the MSR DromLite Bag can be paired with a filter to create a gravity-fed system, making it easy to fill multiple bottles at camp. If you're using a hydration reservoir, ensure it fits your pack and has a cleaning kit to maintain hygiene.

• Personal hydration: reservoirs (e.g., QuickDraw Reservoir) for on-the-go sipping
• Group storage: DromLite bags in 2L, 4L, 6L, or 10L sizes
• Compatibility: check if your water bag works with your filter system
• Maintenance: use a reservoir cleaning kit to prevent mold and bacteria

Top MSR Water Storage Products to Consider

MSR is known for its reliable water storage and filtration systems. The MSR DromLite Bag is a favorite among backpackers for its durability and packability. Available in 2, 4, 6, and 10 liters, it's perfect for everything from day trips to basecamp. For those who prefer a bottle, the MSR TrailShot Pocket-Sized Water Filter is a great option for quick hydration on the go, but for larger storage, the DromLite is unmatched.

Another excellent option is the MSR GravityWorks Universal Bottle Adapter, which allows you to connect a standard water bottle to a gravity filtration system, making it easy to fill multiple containers. If you're using a hydration reservoir, the MSR QuickDraw Reservoir is a lightweight choice that pairs with the QuickDraw Filter for fast, clean water. For long trips, consider the MSR Guardian Purifier Maintenance Kit to keep your purification system in top shape.

• MSR DromLite Bag: sizes from 2L to 10L, durable and packable
• MSR TrailShot: pocket-sized filter for personal use, but not for bulk storage
• MSR GravityWorks Adapter: connects bottles to gravity filters for easy filling
• MSR QuickDraw Reservoir: lightweight hydration option with filter compatibility

Practical Tips for Managing Water Storage on the Trail

Once you've chosen your water storage, use these tips to make the most of it. Always fill your water bags to capacity when you know a long dry stretch is ahead, but don't overfill if you'll be filtering soon. Use a water filter to treat natural sources rather than carrying all your water from the trailhead. This reduces weight and allows you to carry less.

When using a hydration reservoir, clean it regularly with a reservoir cleaning kit to prevent mold and bacteria buildup. For group trips, designate a 'water master' to track consumption and ensure everyone stays hydrated. Finally, practice using your water storage system before your trip to avoid surprises in the field.

• Filter water from streams and lakes to reduce carried weight
• Clean your reservoir after every trip with a cleaning kit
• Practice setting up your gravity filter system at home
• Use a water tracker app to monitor your intake

Choosing the right water storage capacity is essential for a safe and enjoyable trip. By considering your trip length, group size, and water sources, you can select the perfect gear. MSR offers a range of water storage solutions, from the versatile DromLite bags to the convenient QuickDraw Reservoir, ensuring you stay hydrated without excess weight. Explore the MSR water storage collection to find the ideal fit for your next adventure.