When I run any distance less than about 20 miles I only carry a small water bottle with me - with some Shaklee performance in it; 2 fruit leathers, and a cliff bar.
Generally, I don't get dehydrated or that hungry. I tend to drink a lot of water during the week (well try to); and the night before and the morning before, I really eat A LOT. Actually, really the 2 days before, I start upping my calorie intake. Then, after I finish my long run, I eat again, a lot of food.
I am on the fence about a 50k in western, NC (well assuming I get in). And, there is little aid - advice? I am looking at Camelback packpacks - maybe the "CamelBak Octane XC 70 oz Hydration Pack." I do have a camelback - fanny pack, but it is annoying and ride up (I have very narrow hips).
Thoughts??? I know - I need to hang out with more ultra runners - hahaha! to learn