The one thing (of several) that will spoil you about sailing locally, is that you never have to worry about running aground. Sure, there are the known spots (like immediately north of your SS gap) but, once out, you never think about it. Not true, elsewhere. This summer in the North Channel I felt/heard my CB 'dragging' on the bottom rocks two different times. My fault the second time, as I was in the midst of a dozen islands trying to PLOT my position... and of course I wasn't where I THOUGHT I was
It's often times 'Rock Soup' elsewheres.