Perhaps I am mistake, but I believe that open carry is not allowed in National Parks generally, that the law which was passed only allows for concealed carry. Is that not correct?

What I carry, whether concealed in a backpack or fanny pack, depends mostly on whether I'm concerned about two legged or four legged threats. I'll usually carry a 4" 500 in griz country. Where I'm not worried about griz, I'll carry a 629PC 2 5/8" or a 66 in 2.5".