A sassy gull sits atop a post on the shore of Mackinaw Mill Creek Camping. Campers are advised not to feed seagulls, as they can become surprisingly aggressive. We have seen seagulls flock to and destroy campsites where food was carelessly left exposed. Under no circumstances should guests feed any wildlife that they see in the park. Very few foods and even fewer snack foods that humans typically eat are good for birds or animals.