Hi Sandra,
All the attractions will be overloaded that week. No matter what park you go to outside of disney saturday is the busiest and sunday the slowest( in the morning). Saturdays are super busy all the time at MK.

If we are at disney on a saturday we usually head for Epcot

,as it is the easiest to get around in on busier days. They also offer fast passes for test track, mission space and soarin. You can run for one attraction, do it, get fast pass for another one and then probably have to wait 20 minutes to get on the 3rd one. Unless you do other things there until you use the fast pass and then get another one for the 3rd ride. But be warned lots of times all the fast passes for the entire day are given out by 10:30 or 11:00.

The Worlds area doesn't open until 11:00 a.m. so you have time to pretty much get done in future world by then if your there when it opens. In the Worlds the only actual rides are a boat ride in mexico and a viking ship ride in Norway. Norway can line up quickly. Mexico moves along pretty fast. if you have to choose between them, go for Norway. It is fun where mexico is slow and relaxing. Both are good.
There are plenty of shows and entertainment at all the worlds.

The times will be listed on a brochure to let you know when. If you ever enjoyed the Beatles, then the British Invasion at United Kingdom is a must. they are excellant. They are behind the buildings in a small courtyard. Not many benches to sit on, but most just sit on the sidewalk. If the little ones like the Pooh characters there is a toy store in the back ( by the concert) and the pooh characters are there all the time, usually little to no line.
Gatorland is ok on a saturday too, just get there when they first open.
One certain days disney opens one hour early at a selected park just fo their guests in their hotels. Those parks are super busy on those days. We avoid those parks even when we were staying in a hotel there. Almost everyone staying in a disney hotel will be there on that particular day.
another thing you can do to keep busy on a busy saturday,maybe when the parks get too busy. By blizard beach there is a mini golf course, actually two of them. Lots of fun for all ages. There is fantasia mini golf by the swan and dolphin too, but it gets way to crowded for me. The 2 courses by BB are Christmas themed too. And there is a 24 plex theater at downtown disney if you want to see a movie. It does give you something to do during peak hours in the afternoon. Sea world is small by theme park standards so it fills up quickly. This is the first Christmas that the remodeled cypress gardens will be open, so i honestly don't know how it will be. more locals than tourists go there. my son works at epcot.

If you go in mouse gears gift shop watch for a Peter from silverton oregon on his name tag. His wife works at MGM at rock in roller coaster, tower of terror and fantasmic, her name is Emerald. be sure and say Hi

if you see them and tell them you know their mom and mom in law. They get kick out of it when a dis board person looks them up.
Be sure and let everyone know how your vacation goes. Of course we will meet and talk on the ship too. Looking forward to meeting all of your family. My grandaughters will be 14 and 6 and grandsons will be 3 and 11. maybe they will meet some of the kids on this thread too.
Kathy
mom x4,grandma x4