I would stay away from the Hartford. My young daughter was rear ended by a driver that had Hartford and they tried to bully her into submission until I got involved.
You can try State Farm which we use but we carry a $2M liability rider on every thing. State Farm covered $8000.00 damage to Motor Home when towing insurance company refused. Do not know if State Farm litigated against the towing company or not. $1028.16/ annual on 2002 DSDP.
Just think how much damage you can do as you drive past a new car dealer and lose control or you tow comes unhooked.