So I was supposed to go hiking the Zion Narrows with a friend, but due to work, he won't be able to make it any longer. Is hiking the Narrows solo okay, or recommended against? I'm 24 and in good shape, if that matters. I'd really like to go, as I won't have any vacation time for another 9 months, and I've been meaning to go for a while but always end up going elsewhere. Any comments from people who have done it before, either solo or with others?