When I went to Six Flags St. Louis in July 2009, I didn't know of this new locker policy and the security guard at The Boss was really rude to me about the whole thing. I am sure he had been through the whole routine 100 times already that day, but just explaining to me the new policy would have made me a happier customer at Six Flags St. Louis.
When I went to Six Flags St. Louis again in October, I thought I was prepared for the lockers because I brought quarters with me. Come to find out, they don't take quarters. You have to transfer your dollar into a token that is accepted. It was a slow Sunday when we were there, and I was able to put my camera and small bag at Tony Hawk and ride 3 other rides before time was up, so it worked out well for me in the long run.
Mr. Freeze still has the side-pocket place to put belongings....