Hi Gordon,
I used to sail there, you can get normal car under bridge, anything bigger leave out side, high tide no problem, as it dries out but there is deep water channel right up ex estuary, only got 2 slips through gaps in wall, ok if people go through and get out of way, if they don't can be a pain in the arse, if you get wind over tide, can get very lumpy.
see you there.
jeremy