i have some friends going down there in a couple months, that area looks so fun to ride in. i've been there but never on a bike or quad.
The slickrock was so fun,,, traction like a cat on carpet. Hell's Revenge Trail just east of town was the best but a very popular mountain bike area, I recommend riding this when mt bike traffic is minimal. The mt bikers were all very cordial I have to say. S.E. of here was another slickrock trail called Fins & Things, excellent trail too.
The Sovereign Trail N.E. of Moab about 12 miles is a great motorcycle/atv riding area.
Good to hear from you maddog