The two links below are confusing me. Can you or can you not have a wallet in your back pocket? And can you or can you not carry a clear ziplock bag full of your pencils, passport, ticket, etc.?
http://www.300hours.com/blog/your-cfa-exam-day-survival-guide-a-practical-checklist#.VWEBmksg9BV
http://www.300hours.com/blog/cfa-exam-day-checklist-items#.VWEBm0sg9BU
wallet is fine
I always carried my wallet in my back pocket.
About the clear plastic bag–I think it depends on the test center. Try it if you like, but don’t be surprised when they make you leave it behind.
FYI- I tried to bring a ziplock bag carrying my pens/pencils/eraser and exam ticket into the test centerl – and was asked to throw away the ziplock bag in the hallway (literally about two football fields away). Sat for the exam in Los Angeles.
wallet is fine, no one is going to do a full pat down. just make sure you never take it out to avoid trouble.