We have a slip on broad creek just past River Dunes. River Dunes has the best pump out we have encountered as well as a nice marina - floating docks, fuel, restaurant.. . There is another marina just past point marina Ensign Harbor:
There is a list of marinas for NC and other areas on Claiborne Young's site Cruiser's Net » Marinas NC-All
with details. We have used Claiborne's cruising guides and found them quite good. Also ActiveCaptain - The Interactive Cruising Guidebook - Marina Reviews, Fuel Prices, Anchorages
may have a list of marinas for the area.