[Richard]

Let me try to explain a couple of different scenarios depending on what you are trying to do.
There are two ways I used to jack up
The front. The easiest was to use two bottle jacks under each lower A arm out close to the tire. You may have to raise the coach on the air bags in order to get the jacks to slide under the A arm.

The second method is to put a bottle jacks under the center plate between the lower A arms.

For the jack stand placement look behind the tire for a piece of channel iron that goes all the way from one side to the other. About 20 inches in you will see a large vertical frame member. The junction of the horizontal beam and the vertical beam works as a jack stand location.