I'm jealous! I got to go up in one of the Hueys a couple years back. It was amazing. They whipped us around a little but it stayed pretty vanilla. I wanted to go up in the Cobra soooo bad. It looked like a COMPLETELY different experience.
If anyone is ever passing through Dayton, Ohio - I highly, highly recommend checking out the Air Force museum at Wright Patt. It is incredible, and it's free.