My van is getting a little tired, and I am considering alternatives to getting my toy around. Can someone explain to me a bit about the hitch mounted bike haulers? Do any fit a 1 1/4" class 2 hitch? What about hitch mounted cargo carriers? Would that be a reasonable solution? What keeps the bike from rocking side to side on the car? From a slightly different angle: What's the most fuel efficient vehicle that can accept a 2" reciever hitch?