"Are tow Dolly's a Hassle?"
Like others have said It depends on your health and condition. I towed with a dolly because I had a 2012 Civic that couldn't be towed 4 down. Now I have a 2014 CR-V that can be towed 4 down. I don't plan on going back.
The biggest thing when using a dolly is to follow the manufactures directions EXACTLEY. Some lock the steering some don't failure to do it right will cause damage to your car. I saw a camper pull into a campground with a new Pries on a dolly that he didn't lock the steering (as required with his make) and he had damaged both sides of the car by the fenders of the dolly. He still had the sticker in the window.
Little trick when loading leave about an inch gap between the tier and the front rail. Now you can get the straps tight the first time.
Bill