What bike (carrying) racks are available for Pop-Up Campers? I've got a popup (tent) trailer and need to carry 6 bikes. I'd prefer not to put them on the roof of my van (the roof rack is rated to only 100 lbs and it's really high for lifting bikes onto).

So far I've found this one:
http://www.discountramps.com/pop-up-camper-bike-rack.htm

But I also saw a Do It Yourself design for one that is a lot simpler. It would be great to find a simpler less expensive one like that to purchase.
Add a second towball on the rear of the camper and fit a car bike rack for three bikes.    If your camper has a spare wheel here, then a wheel mount may also work.


Add another upstand of some description on the front of the camper for a duplicate setup, and put three bikes on the drawbar.  Noseweight should be about the same.
 or


Similar option is to run two towballs on the towing vehicle, like this


The other option is to put some bikes inside the camper before folding it, but there's often not a lot of space once its all folded down.