Yes I find between 5:45am and 6:00am is when the reservations drop. Just keep in mind that people with Disney hotel reservations can book dining 60 days in advance, plus the length of their stay, up to ten days. So you may still not be able to find availability for popular dining like Space 220 or Topolino's Terrace because they have most likely already been fully booked by people staying on property. I finally got my annual pass this year in September and have being doing short trips every month since, and I have had this happen to me many of times hahahaha. But I still say try just in case. You can always call the dining reservation line at 7am to just double check (just be prepared to stay on hold for a while) Plus some times you can luck out on the day of your arrival because people change their plans last minute. I picked up Topolino's Terrace breakfast with the characters while I was waiting for my early morning flight at the airport last month because someone had cancelled. But either which way, you will definitely be able to find something great at 60 days out because there are a ton of choices.