Funny, I was going to suggest that you try
these "Pemmican bars". I have carried, paddled, stashed, stored and scarfed these suckers for nigh on 25 years. I know some city slickers who don't care for them, as they do not come in either 'pizza nacho burrito' or 'chocolaty, fudge dripping, triple-dipped German chocolate cake' - but I love 'em.
One of these with about a pint of water has been my breakfast, lunch or dinner on many, many excursions afoot and afloat. They fill me up, pack/carry and store well, are tasty to me and don't have a lot of crap in 'em.
(Plus they don't send me screaming, fumbling for my belt and running for the closest makeshift woodsy facilities/comfort station as do the sugar-soaked, exlax-style Cliffbars - whew, doagies... That's tough - and can be very NOT pretty - when it kicks in whilst paddling a briskly-moving river with only high-banks...)
http://www.mealpack.com/index.html