I saw where someone got Yakima under mounts and then put the kayak braces on it....if i can find them i will bring them here. i was thinking the same but for canoe and bikes....canoe is easy with a couple yakima cross bars on top of rack....for bike the swing away bike rack is what I was looking at or one that mounts to spare tire....i have one for rear deck of car I am going to try....an Allen rack I think it is. Here are some others I was looking at
http://www.thuleracks.com/product.asp?dept_id=8&sku=964 HR225 spare tire mounted racks, rear bicycle carrier Yakima Hitch Mount Bike Racks : 2 inch, 1.25 inch at Rack Attack (Yakima now owns Rhode Gear as well)