I made our reservations for last month through Orbitz, and did not make any requests ahead of time. We had booked a premium view, and our room assignment was in the Fantasy Tower, pool view. That is considered a premium view, but I was hoping for the Adventure Tower with a Downtown Disney view. I asked politely, and the CM was happy to make the change. I would agree that arriving early is your best bet - we got there around 10:00 am.