Fry bacon. Drain, cool, crumble and set aside. Cook and scramble two of the eggs and set aside. In a large bowl, cream together butter and sugar. Stir in the remaining two eggs and vanilla. Add flour, salt, and oatmeal and mix well. Carefully fold in the bacon, scrambled eggs, and cheese. Drop by teasonpoonfuls onto greased cookie sheets. Bake at 350 degrees for 10-12 minutes. Serve warm or cold.