Setting up a domicle-Need advice

We have changed from New York to Florida a few years ago. We are not 100% Full Time, but do spend approx 9 months a year in our RV. We still have property and house in Western New York, but is now insured as a Seasonal Residence, which we use as a home base when North for the Summer.
We made the switch to a Mail Forwarding service long before chancing domicile an use it as the billing address for everything.