While teaching sailing to high school students in the Bay for two summers in an old IOR with over six feet of draft we hit bottom at least once a week. Luckily we always seemed to land in the mud. A few of the marinas should have paid us for all the dredging we did in some of their channels
One interesting way to un-stick yourself from the mud, if you have six teenage kids on board, is to have a few of them swing from the bow to the stern on the main halyard while the others hang off the low side. It's amazing how much you can get a boat to heal with this technique.