Chuckie's really trying to make an impression :)
He's responding with two of his puppets ("Tommy Walker" & "Italian
Greaseball").
I'll answer them "both" in one post.

The source is Billboard.
They only report the info when the venues report it to them. There is
often a lag of 3 or more months.

Shouldn't be a big surprise (it was reported here earlier).
Hagar is huge in St. Louis. He's sold out the enormous UMB Bank
Pavilion three times in a row. They're even planning on opening a Cabo
Wabo Cantina in St. Louis next year.

Here's a few more just released by Billboard (note the Poison Devore
show is also from July):

Artist/Event: GODSMACK/ROB ZOMBIE
Venue: Verizon Wireless Amphitheatre
City/State: Bonner Springs, KS
Date: September 19, 2006
Attendance: 10,804
Capacity: 10,804

Artist/Event: GODSMACK/ROB ZOMBIE
Venue: UMB Bank Pavilion
City/State: Maryland Heights, MO
Date: September 17, 2006
Attendance: 11,430
Capacity: 21,310

Artist/Event: Rob Zombie/Buckcherry/Shinedown/Bullet For My
Valentine/Alien Ant Farm/Classic Crime
Venue: Verizon Wireless
City/State: Noblesville, IN
Date: September 16, 2006
Attendance: 24,994
Capacity: 24,994

Artist/Event: Guns N Roses/Alice In Chains/Muse/Papa Roach/Avenged
Sevenfold/Buckcherry
Venue: Hyundai Pavilion
City/State: Devore, CA
Date: September 23, 2006
Attendance: 30,365
Capacity: 41,670

Artist/Event: Poison/Cinderella/Endeverafter/Slaughter/Faster
Pussycat/Bang Tango/Pretty Boy Floyd
Venue: Hyundai Pavilion
City/State: Devore, CA
Date: July 1, 2006
Attendance: 8,073
Capacity: 17,216