My mom goes camping quite a bit and she really likes FrontierTown in Ocean City:
Frontier Town: Ocean City, Maryland Camping . I have not been, but she goes at least twice a year. She is taking us to their sister property about 15 minutes away, Fort Whaley, in July because she couldn't get into the other, but it should still be fun. Free waterpark, mini golf, close to the beach... sounds good to me!
