Good for switching the days around. You'll enjoy FOTL to end the trip.
It's best to check the AAA web site for discounts on park tickets.
You usually go pick them up at your regional office. That's how it works down here in South Florida. Go on the
www.aaa.com website, and find the nearest location to you. The discount is usually about $5. Not a ton of money, you save more by packing the cooler and eating breakfast (doughnuts and milk) in the hotel room.
Here's where you will find the
www.publix.com just north of IOA.
http://www.nogodforme.com/directionstopublix.htm