What personal items are exempt from judgements?

Depends on the state.

Ten months ago, my friend had introduced his friend to provide boat storage service for the winter. I have my boat parked in his friend's property for the winter and the service was ended in March and paid. The boat was supposed to return to my property in March. Because I was hospitalized in March and recovered recently. The guy who stored my boat did not want to release my boat without extra payment for the months after March. And he keeps on charging me more fee as long as the boat in his premise. Should I call the police to have him to release my property(boat) and arrange someone to move the boat? Please advise.