I have seen two sizes of Bear cans. I've heard of a kevlar bear bag but I don't think it is approved for Yosemite. Is there a Bear can that is small that would work for one person for a one night backpack outting? I'm planning for Yosemite in July and don't like the idea of lugging one of their huge cans just to go out one night. Besides that darn thing weighs 5 pounds! Thanks