I have done a wall mount for a 22" LCD TV in our bedroom. Our TT had a fold down shelf to set a TV on. I removed the shelf and put the mount in the area of where the shelf was. The wall was reenforced for the shelf so there was adequate support to anchor the mount. The walls are just not strong enough without something backing them. The ceiling on our TT Styrofoam cored and does not appear to have enough meat to screw something to that has any weight to it. Make sure you get a locking mount if you plane to have it up when you travel.
2013 Cardinal 3800FL
2009 GMC 3500HD CC LB SRW