Towing Issues: towing 1997 Trans Am WS6 automatic, rear tires, nutral

Question
We want to tow our 1997 Trans Am behind a RV on a 2 wheel Dollie. The round trip will be about 400 miles.

Besides pulling the car in nutral with the key  

Answer
You didn't specify which type on transmission you have. Generally the rule of thumb with towing is rear wheel drives should have the rear tires off the ground and vise versa for front wheel drives. This method prevents the drivetrain from turning. In your case meaning the rear tires in the dolly and towed backwards. Please refer to all safety instructions with securing and transporting the vehicle.