Maverick is right, they are T6 Texan IIs. The dark might one might actually be a Canadian version the Harvard II. They're painted dark blue like the Hawks they use and the markings on the wings look like Roundels. That raises the question that some of the F18s may in fact be visitiing Canadian CF18s.
As for the F4s, I found another dicussion on another website and the conclusion was that the F4s were Luftwaffe F4Fs as seen below. They were deactivated in late 2004 which places the photo in that time frame.
The Kfir and Draken are owned by ATAC USA who provide dissimilar combat training for the services.
Thats it although I can't identify the silver UFO at left hand side of the picture. Not sure if it's a U-F1 or F2