Getting back to the topic, our first fiberglass RV was a 13ft Compact II, the one with the pop top and the door in the rear. I don't remember the year it was produced, but we bought it in 1975 and traveled through more than 40 of the 48 in the next two years.
The tow was a very worn Peugeot 404 wagon. Once when stopped for road construction in the Rockies, the road crew had to give us a "hand" to get us started back up the mountain.
It's deficiencies were no-insulation, extremely limited cooking facilities, same for general storage, too large a bed and a weak frame. It was also very square, though quite low with top down. The rear door was the dirtiest place on the trailer and not only could you not open it without getting your hand dirty, but it didn't seal too well and much of it came in and blew around inside while traveling, especially on dirt roads.
is quite a step up, in my opinion. But it is heavier and larger and towing it with the old Peugeot would not be very advisable.