Help with a six flags season pass?

I am going to six flags for the first time this season and I have a season pass voucher paid for, but not the actual pass yet. I need to get into the park and get my picture done and stuff so do I just take the voucher with me to the gate and they will scan it and let me in to go get my pass (like they would let me in on this voucher once so I can get my pass). Or do I need to talk with customer service there and get a special pass to go in?