[jyl]

The 13' trailer won't sleep four. It will sleep two and they are sharing a smallish bed.

I think I'd rather have a big, multi room, standing height, "family" tent than that 13' trailer. The larger ones have three "rooms". They take maybe 10 min to set up. Folding cots or air mattresses in the two side "rooms", a folding camp table and folding chairs in the center "room", and a two burner stove and cooler on another camp table outside. Some propane heaters are designed for in-tent use ("Mr Buddy"). This will be more spacious and comfortable than a 13' trailer, for two or more people. The setup time will be only a little longer than parking and leveling a trailer, and being able to drive normal speeds on the way to the location will save you more time than the extra setup.

Plus you don't have to store a trailer, won't be limited in where you can drive and camp, don't pay the gas mileage penalty of towing.

In the prior thread on pickup campers, I missed the requirement to sleep four. That rules out the low profile fold down models, I think.