The Easter Jeep Safari news letter has a good description of the popular trails. Tells how to get there, as well as difficulty ratings.
Head to Long Canyon (easy) it's scenic, and get a pix for us, you'll know where when you see it. Then off to Gemini Bridges, you can head out of there and take in Bull Canyon, also easily doable. Klondike bluffs is worth looking at the Dino Tracks, and north of Thompson Springs has some of the best petroglyphs ever found. All of these are easily enough to do, and worth the exploration. A trip into Hells revenge is always fun. You can watch at the hot tubs, doubt it would be wise to try that with a stock rig.
The above book is good as well.