I just completed the installation of a TV mount in my Salem 261BHXL TT. The TT has 2 mount locations, 1 over the dinette and the other in the bedroom. I do not see the need for 2 TV's, so I chose to go with a Bell'o mount for both locations. The mount over the dinette is a fixed mount with tilt only, and the bedroom mount is an articulating mount. The reason I went with the Bell'o design is that the TV can be easily removed and placed on either mount without any tools!! This way during transport I remove the TV for safe placement as well. There is a plate that remains on the TV that you never remove.
As far as mounting, get yourself a stud finder from the big box store, you will feel alot better of knowing where the block is in the wall, trust me. The 3" screws are way to long, the will break thru the other wall. I used 1/4" lag screws, with a washer under the head, and ended up grinding the length down to about 2 1/2 - 2 3/4 inches long. I used 5 to hold the bracket. Yes that sounds like alot but I did not want it to loosen on the wall. Make sure you predrill with a drill diameter no more than the diameter of the threads.
The mounts work well and I ordered them on Amazon, and recieved them next day, and only paid the free shipping rate.
2012 Ram 2500 Cummins
2014 Salem Cruise Lite 261BHXL
ProPride P3 1000#
2014 Camping Nights = 12
2015 Camping Nights = 15