You need to check your owners manual about using a dolly with an AWD car. Some AWD drive cars can only be pulled on a trailer. Some can be towed flat. Some can be towed on a dolly. It really depends on the make of the vehicle and how the AWD system works. The difference in automatic vs manual transmission will also make a difference. Perhaps if you post make, model and type of transmission we can help determine is dolly towing is even possible.
At one time or another I have used all three methods and once you are used to each way the connecting/disconnecting is not that hard. What to do with a dolly or trailer can become an issue at some campgrounds. I have been to some that had a specific area where the dolly or trailer had to be parked.
Mike