my guess is no, just because I don't see any internal structure heavy duty enough to handle the anchor points. Ours has a rack for bicycles, surfboards, etc., which does seem pretty sturdy but I'm just not soo sure. On the other hand, I don't see why you couldn't beef it up a little- like on a boat just use plywood underneath the fiberglass for support & anchor there. Good luck getting the bikes up there. You'll need a pretty long ramp!
We love ours. We were tent campers, too, before buying our second-hand Coleman. There are quite a few out there for sale, and most we looked at were in pretty good condition. It's surprisingly roomy inside, goes up/down easily, and tows like it's not even there. Sure, it'd probably be cool to have one of the 18-24 footers. But if you can't afford one and the monster truck to tow it, this is definately the next best thing. Another plus is you can park it in your garage, or in the driveway and not have a huge obstruction to peeve the neighbors.