dolly vs flat

Flat towing is easier to hook up and disconnect.

I use a dolly to tow my Prius because a Prius can't be towed 4-down. I use the car tow dolly (http://cartowdolly.com/).

Since the company is close to where I live, I visited the factory and liked what I saw. It has built-in brakes and was less expensive than the equipment required for flat towing.

Four down is easier. Two pins, two safety cables, power cables for lights, car in neutral and maybe pull a fuse and you're ready to go. That's me about 3 minutes to connect or disconnect. The down side is you'll need a car that has a transmission that allows plus a mounting bracket installed on that car. Total cost can add up quickly for a tow bar, brackets (aka base plate), may be a braking system, lighting circuits and such. Throw in the cost of buying a vehicle just for the purpose, $$$$$.

Dolly towing is a bit less expensive and just about any conventional front wheel drive car can be towed. Down side is messing with the dolly at home and at the camp site. A hitch on the toad will help to move the dolly around. Getting the car on the dolly is a bit more work and you'll need to watch the tie down straps. You could have your state of residence plating requirements, inspection and yearly tax with a dolly also.

I tow four down only because I already had a compatible car in the drive way when I started. I probably would have gone with a dolly rather than buying something at that time just so I could tow four down. If my one car that is configured for towing breaks down of is no longer usable I'll need to spend a few $$$ to get the second vehicle we having in the driveway ready for four down towing. If I had a dolly no such cost.