I can totally relate with not finding too savory of foods super appealing. One trick is to add something sweet to the food - kind of like those M&M's with the peanuts. On the two Tour Divides I did, I didn't use one gel (except the one given to me at the Outdoorsman!), or energy bar - after a few days, they get prohibitively expensive to buy, for what they are - and a big reason to buy them is convenience.
Rather, it's just a challenge to find that doesn't come from a lab. Most gas stations around here have some sort of selection of nuts in different forms, fruit, yogurt - that sorta stuff. I've been trying to cut down on dairy, but string cheese is another thing that is usually available. I def. go on price too
Sometimes a simple item like string cheese can be marked up by 300%. Same with energy bars. Jerky is a great one too, found at gas stations around here - not too much fat (unless you find BACON jerky!) but loads of protein - a little pricey, though but keeps well in weird situations (can't be smooshed). Only have had problems with fish jerky - that didn't sit right.
A lot of supermarkets here now have bulk food isles. A godsend.