My crash bag is full of cliff bars. Reasonably light and easy to carry, inexpensive and found in most stores. Not bad tasting either. I used to have mainstay bars. Those are really high in calories but are a bit on the expensive side. They don't pack as well as they come in vaccum sealed stacks. They also taste like a mixture of sawdust, lemons and used cat litter.....I will stick with the cliff bars for now.