Back in the days having 5 bikes of various sizes and travelling in a GMC Safari as a TV. Occasionally we put a couple of bikes in the TT. We just laid them flat on the middle aisle and didn't bother wrapping them up. We survived.
My BIL, also a family of 5 with a minivan, had a better idea. He secured a piece of threaded rod span across the dinette seats with the table removed. He then used some nuts to fix the front forks of a couple of bikes for transportation.
I now have a short bed PU with a canopy. I built a bike rack with 2x4s to hold the rear wheel of the bikes. I can take up to 5 bikes to camp. It doesn't leave a lot of room for other toys. Luckily the nest are getting empty.
