There are plans to make this a year round museum, but currently if you want to see the collection there is one event in the Spring and one in the fall for the public at large. This event highlights the car collection and invites the State Police Museum in to show some of their collection and to participate in a fun Al Capone theme show mid day.
There is a parade of cars so you will want to find a good viewing spot for that while you are there. Blankets or chairs are not a bad option, but you might want to pick them from your car after you've toured the collection so you don't have to carry them around or if you are comfortable you can stake out a place for the parade and leave them unattended while you head out.
The price of admission is $15 for adults and $10 for children. Price of admission does include the ability to tour the collection of planes and World War II items. You can find more information about the event here.
