Just remember draboo, your vehicle is rear wheel drive. So that means you still need to know if you can tow it without disconnecting the drive shaft. Based on replies here a couple of people have said they have done it and didn't have a problem. I guess you have to decide for yourself if that's what you want to do.
And the only reason I'd chose a dolly over four-down is for the ability to tow other vehicles. My main toad is my Dodge Dakota which I tow four down. But I now have a VW Jetta TDI and if I had a dolly it would be nice to take that along on some trips.
Also, on something light like a Geo Tracker I would not buy aux brakes for it. I know people are going to say you have to have them, but I don't agree. If you're pulling it behind a small Class C maybe, but if it's behind a DP I wouldn't use aux brakes.