Maryland Code, Natural Resources § 10-807

(b)(1) A person may not allow any dog, domestic stock, or poultry to enter in any manner on any State-owned wildlife refuge.

(2) The Department may grant a special written permit, subject to revocation at any time, to any person regularly residing on lands included within any wildlife refuge to have any trap, dog, or gun on the refuge. However, the trap, dog, or gun may not be used in hunting wildlife unless done under special permit from the Department for propagating purposes.

(3) Where any portion of a State wildlife refuge is used for a State park, entry by any person within the refuge area for recreational pursuits may not be restricted on the portion used as a State park as long as the person does not carry any firearm or trap nor permit any dog to disturb or chase wildlife.