Pawzitiv, what type of roof cargo bag are you using? I've been looking at the Thule Cargo Bags. Wanted to see if you had a recommendation. Thanks!
Narkhelek, I'm using a Sportrack Sherpa 13 cargo bag. It was cheap (< $40) and the right dimensions/capacity for my big Springbar tent, 2 outfitter sleeping bags and air mattress. All gear inside the cargo bag is wrapped in big orange garbage bags since this cargo bag isn't totally waterproof. I've also inserted a 32" square piece of 1/2" ply as a floor in the cargo bag; it helps give the bottom some rigidity. Because of the RRO roof rack cross bar tubing spacing (relative to the size of the cargo bag), I use some climbing slings as extensions for the front and back hold-down straps on the cargo bag.
The next time I have the cargo bag up on my RRO rack, I'll try to remember to take some pics and I'll add them to this thread.