For the mileage listed, i would be "one of those people" who would suggest pulling the driveshaft something about coasting the tranny for 150 miles in N, ugh. As for the car dolly question, its actually very easy. Just pull the car up onto the dolly and check for clearance. As long as you have say 3-4 inches of clearance and your not driving down any goat paths, it should be safe.