Be careful of where you run the wire for the lights. I understand you ran it through the car, however, where it touches the car going in and coming out will be rubbing on the paint. As you are driving, the wind will blow it around and scratch or put rub marks on paint. I don't know of a perfect fix, just be aware.
Secondly, check the tie down straps after the first few miles. as the car adjusts and settles the straps tend to come a little loose at times.
Always keep in mind that you can't back up! plan every turn carefully. I accidentally turned into a cul-de-sac once. Had to remove car from dolly, dolly from RV, turn around, reattach everything, then continue on my way.
