Ann Arbor pinball show in May has a guarantee of 250 restored games and limited ticket sales to prevent over crowding. Games represent all periods of pinball from the 1950s to present. Camping also available. It's a unique experience. And you can see on the website what games will be there ahead. Lots of very rare games you often don't see. On site repair/parts facility so if something breaks, it gets fixed very quickly. I can't stress the limited ticket sales enough... it's like a concert, when it's sold out that's it. This keeps the people-to-machine ratio very nice. No other show offers that. We try and make the pinball playing experience top notch. Also lots of excellent player additions like all the ColorDMD available installed, user headphone jacks in many solidstate games, little stuff like that. It makes the whole user/pinball experience that much better. http://vfwpinball.com
That said I like Chicago pinball expo a lot too in the fall, but not so much for playing games. the social aspect of Chicago and the seminars are what I like there.