I assume when you mention 'versatility', you mean you can use it for more than one vehicle, otherwise, the dolly would just be adding something else that needs to be dealt with once in camp. I imagine a dolly would be more expensive to purchase than setting up the Jeep for flat towing, but perhaps you have access to a used dolly?
The Jeep will not accumulate milage while being towed. You would still need to place the transfer case into neutral before towing, just as if you were towing 4 down.
Jay & Peggy Monroe with Dolly
Can't take it with you - don't plan on leaving any behind
2016 Newmar London Aire 4553, Spartan chassis
Wrangler Unlimited toad