In the arcade.
Film is available at most shops throughout the park.
You'll want to check the actual hours before you go to the park each day, as it might even vary within a given week. Locker Location Lockers are located under the train station on Main Street. The great thing is, you can access your locker as many times as you wish during the day. This can make a visit back to the car very time consuming, so you really might want to seriously consider taking ALL of your belongings with you and renting a locker in the park. When the Trip is Done Information on MouseMemories.