And tailgate pads have slots for the backup camera. Wheels can block them, but you can just run two to either side for a more clear view. Holds up to 6, but a bike in the middle can partially block the camera. Still workable however.
Tailgate pad for the win. I've been using one like this for years. It's cheaper than most racks, works with my tri-fold tonneau cover, and doesn't cause problems towing our travel trailer.
I came across this article from Airstream yesterday for a new concept model Airstream is looking to develop (not production yet). The basics of it are that it would use solar or shoreline to charge up a large battery bank which powers dual electric motors to propel itself behind a tow vehicle...