April 16, 2008 first day Central States show. Is that a dealer day or first public day?

Going to take a personal day from work and want to hit the first public day. Central States web page doesn't say. Do you know?
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You will need a PNG Invitation, which is available from
any PNG dealer.
I'll be happy to mail one out to anyone who will be in
Chicago that Wed., April 16.......
Fred
will go out in today's mail ...........
See ya there !