We tried approaching hogpen when all moorings were filled last summer and high winds were expected. I was reluctant to go very far, since the dredged channel is VERY narrow and shoals quickly to very shallow depths to each side and we draw 5'-2". Once you're in the cove though, there's plenty of 8-10 ft water.
Lucked out and got a mooring just off the BI Boat Basin - excellent spot, which I would recommend. Like I mentioned above, there should be plenty of moorings in GSP in early May.
We take our kayaks into the creek that continues beyond hogpen - flows past 4 or 5 moorings, the smallish HogPen Marina - which is definitely powerboat oriented, under a road bridge and winds seemingly for miles, opening up into wider ponds. If you get a chance to do it, you'll be sure to make it a seasonal tradition - even if it's just on your motorized dink.
Wherever you end up, you're sure to have a great time.
True Blue . . .
sold the Nauticat