I have a 2004 Georgetown and want to put my scooter on the back. Scooter weighs 250LBs, and I would like to hitch it parralel to the back. Any suggestions where to buy and any percautions I need to take. I bought the motoerhome used and the hitch is bolted right to the frame as far as I can tell. I have read about rear axle weight but can't say that I understand what all that would mean in reference to the carrier.