Hi Faye,
Great choice! Breakfast at the
Crystal Palace is one of my "must-do" meals on every family Disney trip.
When you approach the turnstiles at the front gate of the Magic Kingdom, head to the far right. That one is specially marked for early entrance to the park for guests with advanced dining reservations. The Crystal Palace is located at the end of Main Street, so you'll need to factor that walk in to your time-frame.
If your reservation is for 9:05, you'll want to check in at the host or hostess podium by 8:45. You should plan on arriving 15-20 minutes early for all advanced dining reservations.
Therefore, plan to be at the front gate around 8:20 - 8:30 at the latest.
Hope this helps and have a wonderful vacation,
Kaylene