I can't imagine it looking very attractive either.
The 1/8" luan paneling typically used in RVs is pretty strong in itself. Maybe consider a piece of thin sheet metal like say 16 or 18 ga., paint it a color to blend in, and use some Oscar rivets (a type of blind rivet) to attach the sheet metal to the wall. Use some sheet metal screws to attach the mount. RV manufacturers use a sheet metal backing behind wall paneling. If you can do this over a stud, it might reduce any flexing in the paneling.
If you did happen to find the luan paneling showing signs of staples pulling out (unlikely), could always add more staples or use small finishing washers & screws.
There could be some other methods. Are you using a locking TV mount? Some of them as well as non-locking ones can be heavy and add more weight to the wall.