A few months ago I went to pick up a 300SD parts car. I used my wife's Ford Expedition and planned to use a tow dolly. At the last minute I opted for the trailer with the "tounge brakes". It worked great. Even though the car was for parts only I didn't want to chance a rear wheel lock up. Don't tow the car backward as there will be too much weight on the ground. If you must use the dolly, tow it with the fronts on the dolly and disconnect the drive shaft. I would take the simple routs and get all four off the ground.

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R