I had a 1978 Boler 13' trailer until just recently - the Scamp 13 is a later version. Very nice trailer and it weighed only around 900 lbs so it towed like a dream behind my 4 cylinder diesel Land Rover. It was great for a couple of folks if they were sleeping alone on the front and rear bunks. The rear bunk was a "double" but was a bit cramped for my wife and I (not that we're fat - just a bit heftier than we were when we got married).
The wife liked the camper but really wanted one with an on board bathroom. We went to a fiberglass camper meet last fall and got a chance to look at a couple of 16' Casita trailers. They are much nicer with a slightly wider bunk and a full bath. Those weigh around 1600-1800 lbs and that's probably what we'll move up to.
The 17" Casita has a much larger rear bed - but weighs around 2200 lbs.