The further south you
anchor the deeper it gets. They have these things called
charts.

Just kiddin', really. There are a few really shallow spots further north just east of the channel. They are where a lot of boats are anchored and you think it'd be just great to tuck in there. NOT! Also be aware that the
current changes so you really have to know how to anchor properly. Also be aware of spring tides and depths. Buy Kimball Livingston's
Sailing The Bay, a great read, and fun, too.