Beaver Island Michigan

My, father and I are planning to build a hunting cabin on our property this summer near French Bay. We have a plane to get to the island and a truck on the island also. My, question is if there is anyone that can store our equipment if we send it over on the boat a week ahead of time. This would involve hooking onto our trailer at the dock. Also, what the fee would be for this type of service if it exists. Thank you.