September is a great time to visit. Water temp - you can never guarantee.Â
Fishing spots - there are several throughout the bayside of Ocean City as well as at the Inlet.Â
Since you are looking for a kitchenette - there are a couple hotels that will offer them. Try Castle in the Sand, Princess Royale, or Best Western Boardwalk.
For Condos that will give you not only a full kitchen, but laundry facilities, and more space, check out
www.cbvacations.com.  Since you have speicfic requirements, ie close to fishing spots, call and speak for a vacation specialist. I would highly recommend Breezy Kammermaier.