Thanks for all the help, I know going off on a hike with only water is a bad idea but I did think what would happen if I sprained an ankle. I did stop by a outfitters and he helped me pick stuff off the shelf that I would buy and use. He said a 50-60L would be perfect.

I did find a pack that fit really good but I didn't think about how it would feel with heavy coat and other layers on.

I should mention I live in Nebraska, yes that's right Nebraska not a lot of places to hike/camp but the few that are around will do fine to hone my skills for out of state and bigger hikes.