Paul... Have you read our towing/hauling tech tip?
Ed's comment is germane. With no brakes, it is recommended that the tow vehicle outweigh the vehicle being towed by a good margin or else you will have a very dangerous situation in panic braking or marginal traction events. The last time I used a tow dolly, I ended up in the median facing the wrong way after having the tow dolly enter into uncontrollable oscillations from crossing over a bridge joint at 55 MPH.
Backing up is difficult, even for experienced drivers (did you ever pull tandems when you drove a large car?)... keep that in mind pulling into the gas station, parking lot or other tight quarters.
I forget what tranny you have -- some trannies need some sort of lubrication circulation if the driveshaft is spinning but the input from the engine is not.
I don't like tow dollies. They tend to create more problems than they solve.
