Yes I have and its pretty easy! The wall between the bathroom and the front part of the trailer is indeed strong enough to hold a 19" flat screen. To simplify the installation, I would recommend a sandwich mount. In plain terms, use a piece of wood or aluminum cut to the same size as the mounting plate on the other side of the wall, and sandwich the wall between your new plate and the mounting plate for the TV mount. Just locate where you want the mounting plate to be, preferrably find a place where the mount straddles a wall stud, mark the holes, then drill completely through the wall. Now cut a piece of wood, or aluminum to the same outside dimensions as the mounting plate, with thru holes that line up with the mounting holes on the TV mount. You will need to get longer hardware, then bolt the two plates together with the wall between them and it will be very secure and strong.
2006 Nissan Xterra
B&M Trans Cooler
2011 Nomad 206
Panasonic/Pioneer/Kicker ~ Audio/Video System
Days Camped /2009 / 33