Just to be clear you are towing the car on a dolly and not with all 4 of it's wheels on the ground?
If it is on a dolly then I would think that park would be the choice because it is front wheel drive and the front wheels will be on the dolly.
The neutral switch in acc advice must be from someone thinking you are towing it 4 down which is what you would do after following the proper setup for the transmission.
Jaygee
2005 Bounder 35E on F53 chassis