I've relied on oil for giving me fat and calories. Sounds like you're out in colder weather however so oil might not be so friendly (solidified). I use a heavy dose to fry my bannock and also add it to my quinoa, lentils, and veggies. Otherwise nuts and peanut butter (with bannock).
Curious what kind of tripping you're doing and the duration. I've found that for the 1st 1-2 weeks I don't need as much food as I think (less than I eat at home) even when working very hard as my body seems happy to consume what I've stored in my own body. Then after a couple weeks the appetite kicks into high gear. My dog seems to be the same way. Some days she'll hardly eat anything and then after 1 1/2 weeks she's always looking for more food.
I used to dehydrate quite a bit but don't much anymore, I use dry ingredients instead. I can cook lentils and quinoa just as quickly as a dehydrated meal. All I dehydrate anymore are frozen veggies and apples/bananas. No need to dehydrate bannock mix or oatmeal either.
Alan
I'm starting out paddling, but where I start the rivers are typically small enough that I do a lot of wading, pulling around blow downs, and long lining. Last winter things froze quickly, then I'm pulling the canoe on the ice, mounted on skis. For a while your falling through weak ice, or just have ice on the waters edge, and doing a lot of portaging around ice jammed corners, or swimming it and breaking the ice up. A lot of the time the terrain, at least until the Mississippi, is basically impassable, unless your on foot and unencumbered. If it wasn't January it would be a breeze, its the transitions from 0 degrees to back to 30 a few days later that kill me. It takes a lot of energy to pull yourself up onto the ice after you go in, 2 or 3 times and I'm wiped out.
If its all water, that's easy. If its all ice, thats easy. Its the mix that burns the calories. I'm looking for 30 days without a resupply, which for me is hiking off the river to a grocery store. There aren't many right on the water, Savannah is the best spot on the trip. Total trip could be Dec 1st to March 1st, so 3 months if I feel like it, and can resupply.
I can do all this no problem for a couple weeks. Then, I actually seem to get less hungry. I think I'm a lot better off this year regardless. I was smoking 2 packs a day, now I don't have to pack cartons of smokes. I'm taking less useless stuff. I think the Logan bread looks like a good bet, and then some bags of rice, a bucket of oatmeal, and like instant pasta meals. Also, lots of beef Jerky. Peanut butter would be perfect but it freezes.
Its not THAT hard of a trip, I think the calorie problem last year was just down to poor food choices, and then inability to cook food or melt ice for water. Hopefully I have that solved.