I understand there is a "get into a park free on your birthday" promo in 2009, I also believe that you can opt to take a gift card instead, but how does that work, do you have to go to a park on your actual birthday, and show id, and tell them you want gc instead, even if you're not planning on going to a park that day? My little one will turn 4 the day before we leave, and would like to get him the gc, but I don't think we'll be going to a park that day??