This type of recipe tends to have issues with being too dry or with the cookies seeming to fall apart easily. That is why it's imperative you use 1/2 cup milk and no more than the 2 cups oatmeal called for. If you follow these directions to the letter, I think you'll find these cookies to be super moist.
Depending on the amount you spoon out, this will make anywhere from approximately 25 to 33 cookies. Smaller is better though.