To Wifey B:
As far as accommodating multiple couples, it can be done relatively comfortably. But mostly in trailers, and limited to 2 couples. I have seen large fifth wheels with a kid's bedroom aft.
We have a 25' travel trailer I tow with a Highlander. Our #1 priority was our 2 large dogs, and possible mother-in-law. We have a large 3'x6' bathroom with tub and shower, two full size bunks aft with curtains, and installed a curtain across to separate the main queen bed. The dogs get the bottom bunk, guests get the top, and we still have a dinette and couch on a slide. We have spent 4-5 days with no issues or lack of privacy.
We are much more comfortable than most hotels, and can search out different types of areas depending on what we feel like doing. In 3 weeks we will spend a few days at Assateage, but stop at campground on the way home to plug in and run the AC for a night.