Wow, admission was $25 last year. $100 still bidder registration cost? Bidder registration gets you a guest pass also, so if you are going to spend a few days and have a friend or spouse with you, it would be cheaper to register to bid than pay entry!
A few years back I recall spectator admission was $15.
Dana owns a mansion on Lake Geneva WI and has at least one Citation business jet now, so he's gotta pay those bills somehow, or should I say, we who attend, buy or sell at his auctions have to pay those bills for him!