WE always have breakfast at the Poly on our MK day.
We drive and park at the Transportation and Ticket center. Then just a short walk to the Poly (and Kona) for breakfast. Then we take the monorail from the Poly to the MK.
Coming back, we'll either take the little resort boat back to the Poly (and walk back to the TTC), or take the monorail or the ferry directly to the TTC.
Has worked out well for us for a # of years---