Travel trailers with a dinette/couch slide have a thin 5/8" particle board half wall in between the the two. I had this in my last trailer (Forest River Rockwood) and now the same on my Jayco. I decided to beef this up a bit so I could sit at my dining table and lean back with confidence knowing I wont break the wall. I realize TT manufacturers need to make the trailers light, but this is one place I believe they should add some beef, so I did.
I removed the particle board and bought a sheet of finished birch plywood. Cut two pieces similar size as the original and sandwiched them together. I put a 3/4" birch hardwood edge on the top and front, sanded, stained and finished. I added screws and a full length piece of aluminum L bracket and adhesive to attach it to the wall. I also added a cup holder for good measure. Here's the final product.