Hi John,
Thank you for visiting the Disney Parks Moms Panel. Your magical vacation will be here before you know it! You are correct, the official check-in time at Disney's
All-Star Music Resort,
All-Star Sports Resort, and
All-Star Movies Resort is at 3:00 PM. However, you'll be glad to hear that depending on room availability, you
may be able to check in earlier. The official check-out time is 11:00 AM and the "mousekeeping" (housekeeping) staff needs time to get the rooms ready for the arrival of new guests. The best way to increase your chances of an early check-in is to take advantage of the opportunity to use Disney's Online Check-in Service. During that process, there is a place to enter your anticipated arrival time. The front desk will then know when to expect you. While early check-in is never guaranteed, Disney does do their best to honor your request based on availability.
When you arrive, if your room is not quite ready, you are welcome to use all of the amenities right away. After being cooped up in the car for the long drive, the kids may be anxious to jump in the swimming pool (and you and your girlfriend may be looking to relax on a lounge chair). I suggest packing swimsuits in a separate bag so that you can locate them easily. As of now, the temperature is expected to be in the 70's on your arrival day.
I hope this helps and please do not hesitate to send me a follow-up question if I can assist you further. Drive safely. I hope you have a wonderful vacation together.
Kaylene