How many days are you going to be there?
I suggest getting at least this book, they also have data card for GPS and a larger more expensive book that covers more, but this and the data card would be a big help.
There are several motels/hotels and rv parks with cabins, check for availability.
I would definitely do Sand Flats Sand Flats Recreation Area | Grand County, UT - Official Website and get out on the slick rock, Fins and Things and Hells Revenge Trails, both of these trails have bypasses around the serious obstacles that you will see on utube, my wife hates Hells Revenge, but thats mostly because of the heights and we came out after dark through the Rubble Trouble section(that's when I got told "this thing doesn't have enough lights on it!).
Poison Spider is another must do in my opinion, its rated difficult, but it shouldnt give you any trouble (my wife likes it) and "Little Arch" is definitely worth seeing.
Seven Mile Rim (make sure to see Uranium Arch) along with Determination Towers/ Tusher Tunnels is also a favorite.
Chicken Corners is another easy rated trail thats a fun run.
If you go out highway 128, Onion Creek is very scenic and basically just a dirt road.
This guy does some real good videos of the area, dont get hung up on the extreme stuff, as I said a lot of these obstacle have by passes.
The opening shot is of "Little Arch" on Poison Spider.
If you go to his channel he has several other videos of Moab stuff.
Oh yeah, you will have to get a Utah OHV sticker, you can get that at the 24hr Maverick Fuel/stores or at the Moab Visitor Center, which BTW is a VERY good resource for mapping and info.