I had a 1995 Shadow Cruiser 5th wheel that I pulled behind my 1995 Sonoma pickup. I removed the twin beds and the 'nightstand' that separated the beds and installed a king size foam mattress. Not much headroom but really enjoyed the king size bed.
The trailer had some problems. Water leaks from the gray plastic piping/fittings and intrusion on the rear, under the large window, likely from the stop light clusters. And there was a water tank/outlet leak that eventually rotted the floor. If I purchased one now, first thing I would do would be to replace all the piping with PEX, and very carefully reseal all the lights.
But it was a trailer that we camped our way cross country a couple of times and went from AZ deserts in the summer (not pleasant) to 10,000 ft mountains in the Rockies, and had a great time. It was a real attention getter and many people stopped by just to ask, "What is that?"