Hi.Trying to decide which method is better .We have a 2006 Mustang which Ford says cant be flat towed,and A 2015 Traverse .If we flat tow Traverse it will put miles on it,which I don't really want to do if I'm not driving it.That eliminates the tow bar which everyone says is easier to hitch and unhitch.If I go with the dolly do they all come with brakes?Do I need additional safety straps in addition to wheel straps?Or just wheel strap?What do you guys do with the dolly after you are in the camp site?Some of the campsites don't look like there big enough for a car + dolly .We tried renting a car last time,but that wound up being expensive.Would use car for eating out,shopping,sightseeing,etc .Thanks for any suggestion you may have.