I'd like to see a low-profile lightweight trailer that unfolds into some sort of camping shelter...perhaps the ends can provide a sturdy hammock support, linked with netting and a tarp. Or just a standard tent. The tarp would serve to protect other gear while towing.

Vampires are hot right now, and Halloween is close. How about rigging up some coffin thingy on two wheels and towing that? Let's see who dares disturb the REST of the UNDEAD CYCLOTOURISTS!!!

Any camper style trailer looks to be very unaerodynamic and heavy, unless it's whittled out of styrofoam or areogel. Can you imagine descending a mountain road with one of those and getting hit with a 50-mph crosswind? (it happens) I also think that Walmart security can tell the difference between a bike trailer and a real RV, and would haul off your teeny trailer, with you in it if you played possum.