My Grampian 26 is anchored on the back river of Tybee Island GA. Right now it's a beautifully sunny day (although the weather report says a 80% chance of thunderstorms), but by tomorrow it's definitely going to be nasty.. Am I better off taking my boat to the marina on the other end closer to the mouth of the Atlantic? Or leaving it anchored in the more sheltered back river where I have it now?