For large events, I'm sure you'd need to arrange it with the park service (which is whom I believe runs the field). For a simple meet, nah, no permit needed. It's an old airfield/base (hence the runways) but doesn't see too much traffic these days. Once in a while a plane will come and go but it's very very rare.That looks like a nice spot.
Do we need a permit or anything to meet there? That place looks like a airport or some other recreational facitlity that may need one