How to transport outback with camper?

I normally transport my outback in the back of my truck with a bed extender. Occasionally we take the camper to places that would be great for fishing. I can't transport it the way I usually do bc the kayak would hit the front of the camper. Maybe sitting the back end down In the bed of truck and propping the front up onto the roof? Is there a cheap way without scratching my truck. Don't really want to buy an expensive roof rack being that this is only an issue once or twice a year.