When I entered the first ever Yukon 1000 mile canoe race, the race organizers being unsure of how long ti would take to complete the race in that environment, the race rules required 10 kg (22 pounds) of food ( not including water weight) per person be loaded in the boat (a calculated 3-week supply), regardless of calorie content . For a voyageur crew of 6, that totals to a tremendous weight and volume, even for efficiently dehydrated and packaged food. Throwing a 50 pound bag of potatoes overboard would get you disqualified.
The rules also required bear resistant containment (a legal requirement for passing through the Yukon-Charley National Preserve). So standard bear canisters would not do, and blue barrels are not certified legally bear resistant.
After much searching we settled on a large Yeti cooler, which has been officially tested and certified by the IGBC. Turns out, after our 6 day race, we finished with almost 3/4 of the food left over in the Yeti. Since then that ridiculous food weight requirement has been dropped. The next time we did the race we used several standard size canisters carrying far less food (just an 8 day supply) instead.