Im fairly new to backpacking, but not the outdoors. Scouting, Car camping =) and hunting are fairly normal. My friends have bumped it up a bit with backing into the camp site, i must admit im a bit out of shape for the difficulty increase. I do know the basics of camping, but i would like to know what kind of pack i would need i see a lot off different types, sizes and what not. so i came here it looked like a good places to start.

Im a big guy (6-1, 42in. waist) i tryed a pack on and the waist strap was off by a good 12-15 inches, im looking for a pack that can with stand, stay 3-5 day trip. 40-50 Pounds? but im not sure on liter size and how that translates into weight totals. Any help would be appreciated.