If you have a Six Flags season pass that has parking printed on it, you initially still have to pay the $5 fee to enter the expo center/SFKK parking lot. However, when you pay the parking attendant $5, make sure you ask for a receipt! When arriving at the park entrance, show your parking receipt and six flags season pass (with parking) to whoever is working in guest relations, and right there and then guest relations is supposed to refund you back your $5 parking fee. If they've never heard of this, or tell you that you need to go about getting your refund in another manner, politely ask them to get ahold of a supervisor/full-timer, as they all know that this is the park's new policy - that is, until they get their own parking lot (see http://www.courier-journal.com/apps/pbcs.dll/article?AID=/20070325/NEWS01/703250470/1008/NEWS01 , 3rd to last pagarph, to see that this will most likely occurring sooner than later).
Also, for those of you traveling to SFKK to buy a season pass, it's worth noting that you can't get parking put on your SFKK season pass as they don't offer that season pass upgrade.
I had mentioned this info before in a post many months ago, but w/ SFKK opening up, some of you might find this information handy if you decide to travel there.
