Whoops! Just answered you on another thread, here's what I said!

Mark, If you want to get your tickets checked at Downtown Disney, it's best to go first thing in the morning, and park right down the very end by the Marketplace - guest relations is next to Team Mickey by Ghiradellis ice cream parlour. By going first thing it's not busy, it's really easy to park and you can be in and out in 10 minutes.