its like disney world for firearms enthusiasts. I havent been since 06, so I don't recall ticket prices or anything. However, I do recall the massive range littered with old cars, water heaters, washing machines, etc. The firing line has artillery machine guns of just about any make you can imagine. go to the night shoot, the tracer rounds make the demo more interesting. Plus they have a flame thrower at the night shoot. a little deeper in the woods is the small arms demonstration. Here you can actually pay per mag to shoot AKs, Uzis, tec-9s, etc. They also have the largest vendor area of any gun show i've ever been to. If you can't find it at Knob Creek, then it probably doesn't exist. Knob Creek is one of those events that you simply do not pass on if you have the time & resources to go.
edit: Like Opaww says, if walking a long distance is an issue for anyone in the group, you better get there early as f.