the couch on my model is really a box, with the fron pads screwed on, and the top seat/bed bolted down on the sides. It is easy to take apart, however I had it professionally recovered.
I did not want to attempt the stiching and cutting of new upholstery fabrics, and left that to a pro. He also did my captains chairs, barrel chairs, wall trim and fron ceiling padded trim.
Wile the couch was apart I cleaned out the area around
the water tank, and rewired my stereo and door bell. Both had parts under the couch.
I have not yet sealed my bumpers or grill, I used polish on them and repainted the black grill bars. They take a bit of elbow grease to keep looking shiny.