You would have to tow it with the rear wheels on the dolly, which presents some problems. The steering wheel won't lock in the center position, so you'd have to leave the key in it and tie the wheel straight somehow. With the rear end up on the dolly, extra weight is put on the tiny front tires and the front bumper cover will be very close to the ground - Very little ground clearance and if you went over an undulation at speed it *might* scrape the ground, or if you hit any sort of obstruction (dead animal in the road?) you might tear the bumper cover off. If you had a blowout on a front tire at 65 mph, I could see all sorts of problems . . . .
I might try it for a very short distance, but 900 miles??
If you do it, resurrect this thread again and let us know how it went - I'm sure many people would love to read some empirical evidence rather than all of our conjecturing
Both of our cars have been trailer towed with all 4 wheels on the trailer for several hundred miles - I know
that's safe. Is it really much less weight to stop than towing with a dolly? Most trailers have brakes . . . . most dollies don't. In a panic stop with a lightweight tow vehicle, I think you'd be better off with the trailer
Lastly, I think someone here once tried renting a U-Haul dolly to tow an IMiEV and when they asked what vehicle needed to be towed, they refused to rent them the dolly
Edit: Yes, it was Joe - From earlier in this thread " . . . but then... oh-oh, "it's a rear-wheel drive car with an automatic transmission" which they prohibit because the driveshaft has to be removed and they don't allow that (despite me trying to explain it's an electric car with no fore-aft driveshaft and no automatic transmission) and when I said I'd simply pull it backwards that was also prohibited, so no deal."