Since the bus station for the Contemporary/Polynesian/Grand Floridian and the one for the Transportation & Ticket Center are right next to each other at Hollywood Studios this is what I would do. I would wait for which ever arrives first and take that one. So if the Contemporary/Polynesian/Grand Floridian bus arrives first get on that one, then get off at the Contemporary which will be the 1st stop among those resorts and then use the walkway to the Magic Kingdom. However if the Transportation & Ticket Center bus arrives first get on that one, then when it arrives there you can either take the Express Monorail or boat to the Magic Kingdom.