Does it open up only on one side? I had one that had beds at both ends - queen and full size. That thing had HUGE storage space! I now have a 21 foot camper. I love both! (- sold the pop-up a couple years ago.
Yes, mine only opens up on the hitch side, the back is flat. It would be perfect for a couple and 1 kid, but that's about it. Works great for just me and my son. I'm pretty sure you could tow it with a bicycle haha.