Check the roof inside and see if you can see the outline of a rectangular frame somewhere near the middle of the roof.It might show if you look at the roof from one side to the other with your head close to the ceiling. I have a Rockwood Premier with the frame in the central area of the roof.Some are marked with a small screw that doesn't appear to be doing anything. It is advisable to ask the manufacturer or your dealer first. Make sure your lift system is in good shape as the AC does add a bit of weight.
Check to see if your favorite spots have capacity for an AC unit. If you are going to be using a generator to run it the conversations about that are quite long.
If the roof vent is in the middle then have a look at the corners. Without the reinforced frame in the roof it is not advisable to put one in.