I have a bike rack on the back of my 5th wheel camper. Its the type that goes in the bumper and holds up to 4 bikes.

I would like to get a bike adaptor for our 2 bikes - I don't want the bike rack clamps touching the bikes or the cables that run along the frame. I also have a really good locking cable to secure the bikes and bike rack.

Do I need to leave the seats on the bikes for the adaptors to work? Any particular brand / model thats better then others?

Thanks for the advice!