Can you just show up ( when it's open obviously) or do you have to plan ahead of time

Just show up that's what I did obviously when it's open and give yourself at least a couple of hours to really enjoy it

Yes just walk in. Aside from Lindbergh flight, so much aviation history on long island.

No reservations needed.

No plan needed, just go and its a really nice place, lots of interesting things to see and do. If you take your time and read you should be there at least 2 hours...