Is it packed on the weekends? YES. Is it really shallow? Well that depends on where you run. This time of year you'll see practically dry dirt on some of the shallower flats at low tide, but there are cuts and stuff that are well known. Looking at a map before hand would do you a lot of good.
The water there is clear, it can be muddy with a real strong wind but it's clearer than the upper coast for sure.
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When I gets the cravin to chase fat girls, I call on Bass Bug