And well they should. Grand Canyon ranks at or near the top in NP areas in the number of SAR operations per year quite regularly. A lot of it is simply high visitor numbers.

I am surprised no one has mentioned Maxpedition products. They have a lot of sling packs, small to moderate volume, which are more casual than a conventional backpack. I am not a big fan, because to my eye, they are unnecessarily clunky and too laded with MOLLE (or PALS, whatever) loops that increase the weight and aren't that useful. Still, they can be useful.