I kind of like those powerbar harvest things. Some of the flavors are pretty tasty. Regular power bars aren't good. I remember a coworker of mine was really into hiking and what not. He used to bring junk food with him and I asked why. Powerbars are cool, but twinkies and snickers bars taste good. It's hard to find something with more calories than twinkies! Ramen is good camping/hiking food too. Light, cheap, easy to prepare and fairly high in calories. Also, eating more fruit and drinking more water is often is helpful too. Fruit has sugar, carbohydrates, vitamins, minerals and water. Some of my activities are quite strenuous so often times I try to consume as many calories as possible to keep my weight up. During rest periods I shoot for high protein, moderate carbs, and low fat. Since I all but stopped eating meat and switched to tofu, my energy is higher and my muscle definition better. Funny thing is that since I started eating tofu frequently, I now prefer it to meat.