There are several locations to launch a boat in the Great Egg Harbor bay/ocean City area. None of them are very Hobie friendly.
As mentioned by JoseyWales the Beesley Point Municipal ramp between Route 9 and Parkway near the Tuckahoe Inn. There is a daily launch fee and a long pier at the ramp to move the boat past. The beach next to the ramp is a swim beach (no boats) but very close to the Parkway end there is a location to beach a hobie.
Somers Point Municipal Ramp, at J.F. Kennedy Park, Sommer Pt. Daily launch fee, pier at ramp and very small beach that disappears at high tide.
Corsonâ€™s Inlt State Park Boat ramp at the southern tip of Ocean City. Daily launch fee, pier at ramp before you can get the boat to a beach and a narrow channel to the ocean.
Each of these locations are marked with a "i" on Google Earth.