Now there's an idea. I wouldn't need to use PVC pipe though if my rod case can be strapped on top of the bumper between the trailer and wheel. Although I am tired of assembling and disassembling the rods and reels each time this might be a more convenient way to travel with it.
I'll still need to store reels separately and thread the guides (and disassemble later) but it would solve one of my issues. Ultimately, what I am trying to do is reduce the amount of clutter in the trailer aisle. That's what appealed to me about attaching to the ceiling. There's not much storage for bulkier items in a Hybrid so it all goes into the aisle. All of it together makes it hard to access the bathroom and kitchen when we stop on long trips.