We have in the past picked them up the night before. Now there is no information on their website about Kroger discounts, but we can do the e-ticket thing for a $3 discount - after a little problem we had with them at MDRF, I would rather not do e-tix.
I believe the commercials on the radio say you can get discount tickets at Kroger. Which makes sense since Kroger is one of the sponsors of the faire.