Sorry but I'm having real trouble remembering the huge lump of rock off the departure end of 21. The way I remember it, and forgive me because I don't have a map here, the ground drops away on all sides. If you depart off 03, its pretty obvious that you are not just going to point the aircraft at the mountain and hope to get over it.
I'm glad I didn't read this thread before I ventured to Sedona on my last US flying trip, would have put me off!
Which is why I get concerned about the comments which are sometimes made about Sedona (though in fact having now done a search, I find almost all of the cautionary ones in the last year or two have been from Slim Slag). Don't be put off. Take care but don't be a woos.