I have a couple questions about the Shelter Island boat ramp and the area since I live 3 hours away. Questions: 1. Is this the best boat ramp to use to go to the Coronado Islands 2. Can you leave your truck and trailer parked overnight while you spend the night at Coronado Is. on your boat? 3. If you can park overnight, how many nights are you allowed leave your truck and trailer parked? 4. Is there a wash down area at the ramp to clean your boat and flush the engine? 5. If not, where is a coin carwash?