My walls between the living room and bedroom and between the dinette and bunkhouse are about 1 inch thick. I used an electric stud finder and determined there are one by three and one by two studs between the paneling. There also appears to be a plywood backer where the existing television shelves are mounted.
I purchased two identical articulating mounts to mount two identical televisions that I bought to mount on both walls.
I used 2 quarter inch bolts through the mounts on the dinette side of the wall and lock nuts with washers under the nuts on the bunkhouse side of the wall to secure the amount to the wall at the edge of the wall at the aisle. This allows me to swing the TV all the way around to be viewed from the bunkhouse and bathroom area.
Originally there was a fold down television shelf mounted to the wall. I moved it down about two and a half inches to allow me to be able to open the cabinet door next to the shelf while there is a DVD player and satellite receiver sitting on the shelf. Swung against the wall the TV is right over the original Shelf.
I use the same size nuts bolts and washers to mount the bedroom articulating mount through a stud with the nuts and washers on the living room side of the wall.
Originally there was a fold-down television shelf like the one on the other wall that was mounted on the wall. It was located almost up against the outside wall. I removed the shelf and hardware and added it to the kitchen counter next to the sink to extend the counter top. It also doubles as a tray for the jackknife sofa when eating. The formica top is the exact same formica as the counter top. I also added a shelf about 6 inches from the ceiling next to the bedroom doorway on the bedroom side for a DVD player for the bedroom television.
Both TVs were originally 21 inch. After the screen went bad on the TV in the bedroom I replaced it with a 29 inch that weighs less than the original 21 inch using the same mount without relocating it.
When traveling I can remove the TVs and place them on the bed face down and pack pillows and other items around them if needed to keep them from moving around, but they stay in place by themselves just fine.