Anyone have a sharp pencil Just spent a half an hour on the phone...

Anyone have a sharp pencil Just spent a half an hour on the phone with Progressive. Have a DE insured with Delaware registered RV and travel trailer. Will be garage at an indoor storage facility in Maryland when not use. Progressive is telling me it has to be a Maryland policy. However, Delaware tags equals Delaware insurance. Maryland tags equals Maryland insurance. If I write a Maryland policy, it’s going to trigger a vin /