recommende guide to rv camping in yellowstone book ?

The above-mentioned campground link will give you the campground information.

Here's an additional document with an excellent map showing where the campgrounds are located within the park along with lots of neat information. I don't know how current it is but it would be close:

Yellowstone Campground Map & Other Info

Here is a good link for all the roads going into Yellowstone so you can make an easier choice:

Roads Leading Into Yellowstone

Have fun planning!!