Use your FP+ wisely, keep an eye for short standby lines, and when the lines get crazy, that is a good time to do things you would normally skip. Ride the Liberty Belle Riverboat, or the train, see The Enchanted Tiki Room, Hall of Presidents, of Country Bear Jamboree. Take the time to see the Muppets show in Liberty Square, play Sorcerers of the Magic Kingdom, or the Pirates Adventure game (spoiler, you can "win" a set of FP+ for Pirates of the Caribbean). Climb the Swiss Family Robinson Treehouse. There are plenty of things to do when the ride lines seem out of control, and since you will be returning later for a week, this could be a great opportunity to take things easy, and experience some things that you would not normally do.