When we had our pop-up, I put one of these over the bumper to use for long poles, tent poles, fire pokers, anything long and round.
I then put it inside the pass-through of our first travel trailer, used it on the bumper of our 2nd, and parked it in the garage permanently with our 3rd travel trailer. I also purchased a solid end-cap and a second end cap that was glued on and threaded for a removable cap.
It was originally 10 feet long, I cut it to 8 feet wide.
Price? I don't know what "Crazy expensive" means to you. But if it's something I really wanted, I'll save a few dollars here and there until I get enough and then buy it. "Crazy expensive" is in the eye of the beholder. If I needed this at "this" price, I'd get it:
Click here.