I had a few days at Joes, climing at a lot easier grades. It's all scattered up and down the roadside, you can park up anywhere and doss in the car / bivvy / camp. There is a small store and town nearby, but not much else. Proce is the nearest larger place, with as much as you need to get by; decent supermarket, diners etc, and a place to shower, I think. As AndyR says it is pretty high up and can get cold and snowy.The Triassic area is not far away and a lot lower in altitude, and has some good stuff too.
There's the thick A Boudlering Guide to Utah which is pretty comprehensive, or the Wolverine Publishing (Dave Pegg) Guide, which has some more basic stuff (and may be out of print) which I used and got by OK.
As AndyR says, the rock quality is excellent and there are some preat problems.