I would think this is a Do-able trip with motor assist to get away from the boat ramp and into Cape May Harbor. The Cape May Boat Ramp is located at Lat. 38°57'3.36"N Long. 74°54'35.72"W: Located at the first right turn after crossing the Parkway Bridge into Cape May. The boat ramp is popular with powerboats and a fisherman.
If you are planning to circle the Cape (Cape May Cannel to the Delaware Bay, around the Cape to the Harbor Inlet on the Ocean side, into Cape May Harbor) you will need the motor to cross the cannel. Depending on the wind direction you may need a motor to enter the Cape May Inlet (harbor) from the ocean side. I do not know how easy it is to raise the sail on a 21sc while underway, but you could motor the Cannel to the Del. Bay and pull up on Higbee Beach to raise you sails for the trip around the cape.
Another option is to launch at the Stone Harbor Hobie Beach at 122 street and sail to Cape May. It’s about 10 miles to the Inlet, 15 miles to the lighthouse. I’ve sailed from Stone Harbor to Cape May inlet easily in about than an hour. Nice round trip. I’ve never entered the Inlet on a Hobie ( no motor on my 18 ).
The Lobster house has boat parking (if you don’t mind having a wet a$$ from the Hobie to the bar
). The Corinthian Yacht Club has a good restaurant as well and you’ll be with sailors.
You may try contacting Fleet 443 from Wildwood. They sail from Town Bank north of the Cape May Cannel on the Delaware.
http://mysite.verizon.net/townbank.cats/
Good Luck. Let us know how it works out.