Crowds at the Disney parks on Dec 30-31??

[lindseesmom]

We will be at Disney the 29th thru Jan 4th. This is our first time at Disney during the holidays. I am worried about the crowds. We do have onsite reservations. Does this guarantee us admission to the parks? Also we plan to go to Epcot on New Years Eve which is a Sunday and my family and I are Catholic and always attend mass. I am looking to go to the Mary Queen on the Universe Shrine as we have done other years. We are hoping to go to an early mass and then to Epcot. I hope this works.
Any advice for me?

 

[AdamsPrincess]

We were there for New Years and we had dinner reservations at noon, got there at about 10 and the park had reached attendence, they let us in because of our reservation. You shouldn't have a problem though, Park attendance will be very high though.

We are going on January 4th!!