Other posters suggested park hopping.
But if you don't want to hit up Epcot every day to park hop, you can just wait until noon to visit the parks. Reservations open up day of. AK opens up at noon. Hollywood Studios and MK open up at 1PM.
Morning of, go have breakfast, go to Disney Springs, hit the pool. At 11:50AM drive to AK, make reservations to AK at 12PM (sometimes it takes a minute or two to update), and go right in. It isn't guaranteed especially around busy holiday weekends, but this has worked the last 2-3 months for me.
I say this because if you decide to park hop to AK after 2PM it's less hours you're getting at the park. I'd rather be there from 12 to 6-7pm instead of 4 hours and not everyone wants to wait until 2 to park hop. Downside is that your schedule is pretty much up in the air and it can be frustrating doing last minute plans.