Last time I was there was before 9-11. It's right inside the main gate. We got in OK then, the SP told us to park in a small parking lot beside the guard shack and you can walk in an look around. I don't know about now, but I suppose you could still get in. Hurlburt was my first assignment out of tech school in 65. There is an A-26 there that I worked on in Thailand in 1966. It was sitting pretty close to the highway. They also have another Herk gun ship there, and I believe a C-119 "stinger".
It's pretty nice, you should take it in while you're there.
Randy