Mounting a Bicycle on Class A ?

I carry 2 and sometimes 3 bikes on trips. I remove the front wheels on 2 bikes and insert them into one of the pass trus storage bays, one on the left side and one on the right. If I carry a third bike for my GS I remove the front tire and put it in the trunk of the tow car. This way they stay out of the rain. I don't like the idea of hanging several bikes off of a ladder and hitting pot holes on the roads in the NE, that puts a lot of stress on the attach points of the ladder. Also on older MH's those attach points rust out and become weak, I have replaced several on mine.