Boat & RV Storage on Vacant Park Land

Sorry, I should have be more clear in my question. The park I am looking at is on a busy road with vacant land fronting the road. I was considering using that land for Boat/RV storage for mainly NON - Mobile home park tenants, even though several of the MHP tenants currently do store their boats etc there now. In this event, do you think I would need a separate permit & if so, do you know which government agency deals with that. Thank You