If you are going right when the park opens, I'd ride Dumbo first (avoiding unshaded lines later in the day). From there you can head east (Winnie the Pooh, Tea Cups, Speedway, Space Mountain, Buzz, etc.) or west (Peter Pan, Splash Mountain, etc.). The only time we have been able to ride Dumbo without a long wait has been first thing in the morning. Makes for some great first videos, too.
Have a great time!!!