I just sold my towdolly that I used to tow my VW GTI and am switching to flat towing. I have a Fleetwood 34 B on a workhorse chassis with an allison fransmission. I have a GMC Acadia that I am thinking of using as the dinghy. the VW is not approved for flat towing the Acadia is. the Acadia weighs about 4700 lbs. I have a 5000 lb hitch on the RV will I be ok with that much weight and will the rig have enough power to pull it. Thanks.