The F-16C is serial 87-0258
The O-2 Skymaster is 68-6885, N802A
The tail dragger may or may not be a genuine L-16
The Birddog is N5190G (I have shots of that one at Keokuk, IA)
The Huey is probably the UH-1V medivac advertised. You should be able to see a serial on the tail