Yes, there have been posts on here about theft off boats from that area of the lakeshore. Several questions. The boat will be at a dock overnight with nobody around the area? Where will you be after fishing / sleeping, a motel?

A lot probably depends on the marina. Ask them. How safe do they consider their marina as far as theft goes? The prudent thing to do is take with you all the equipment you can easily take off the boat. You can also purchase some inexpensive motion detection devices that will give any trespasser a loud reason to leave immediately.