Depths over the bar vary considerably, depending on the severity of the most recent storm and the direction of the winds. I've seen the bar awash at low tide and a month later it was submerged beneath 3 feet of water at low tide. It's a crazy area and the bottom is constantly shifting. Also, there are some wild tidal changes to contend with. Near the launch ramp at Oyster I've personally witnessed 10-foot tidal changes. Also, keep in mind there are lots of other locations where you can find safe, sheltered anchorage a bit farther back in the bay. Lots of small hooks to duck behind, depending on the wind direction, but as I've posted many times about this area, the bugs will eat you alive when the wind's not blowing.