. . . You can check in anytime after 7 AM . . .
1) Actually, 6:00am.
. . . the computers change to the next day at 2:00am
. . . but, no check-ins until 6:00am
. . . they don't want people to use 2:00-6:00 as a free day
. . . you know, check in and get a few hours sleep
. . . then hit the parks
. . . previously, lots have tried it
2) As other mentioned, sometimes your room is ready at 6:00am.
3) If so, go and freshen-up before the day.
4) If not ready, change clothes in rest room and go to breakfast.
. . . eateries open at 7:00am
. . . but, grab-and-go at some eateries open at 6:30am
. . . of course, the Gasparilla Grill at GF is open 24-hrs
5) Then, go to parks.