The first camper my wife and I had was a 2006 Six Pac 650S. We had it on a Chevy 1500. It was a great unit and we used the heck out of it. The camper was in excellent condition when we got it- had a great heater, hot water, outside shower, stove, ice box for a fridge which we removed to use for storage.
We used it year round. We made reflect-tex window coverings and pretty much put reflect-tex all over the thing. For winter ski trips we used a honda 2000 generator to power in inside oil heater, mattress pad heater, ski boot driers...
The truck was kind of a looser, so we ended up selling it and eventually the camper too. Funny now, I'm actually kind of looking for a Six Pac T100s to put on my first-generation tundra. We currently have a 2006 Northstar TC700- which is good, but we may go back to a hard side....