X10
Empty parking lot and back into the 'same parking spot coming from both ways'.
Repeat until you do it perfectly between the lines BEFORE you hit the road.
You will then find out that it is easier to back in from the drivers side. If you get into a tricky CG site go around the row and come in the way that will let you back in from the drivers side.
Buy 2 orange cones and keep them in the bay of your MH. Place at the end of the CG site on either side and as far back as the RV needs to be. And if you did your practice in the parking lot, you will be able to back right dead on into your CG site between the cones.:C