I haven't had a problem at Nationwide. They do check for cameras (and weapons) and will do a bag check. Have your camera hidden--I always have a handbag and put camera in a zipped inner pocket.
We were @Nationwide yesterday for a hockey game and they had men put hands up to their sides-I assume this was a concealed weapon check. Ladies had bag search only.
Cameras are allowed for hockey though so checks were quick (concert camera policy is set by each band and they will likely have posted ' no camera' signs).
Here is a link to Cbus review from 2009-have a read and you will see most were okay with cameras.
http://ledge.fleetwoodmac.net/showth...+camera&page=2