Besides general practice backing up, if you're not really confident with driving, I would suggest making a few trips around your local area for practice. That way, you will at least know what to expect from the roads and intersections, and be better able to concentrate on the RV driving skills.
Besides this, there's something oddly satisfying about getting take-out from your local haunt and eating it in your own home in their parking lot...or, at least, so it seems to me. It's probably even better if you move your home to a nearby park or some similar pretty spot.