I believe that the name of the department is Park Catering and Event Services. The CMs there could not of been any more helpful and patience if we were booking a 1000 person event.
After a lot of thought and consideration for the difference in ages and WDW experience, we decided to plan just 3 meals. My first goal was to have a "kick-off" get together. We decided to meet at the Crystal Palace for the character lunch buffet on the first day. Everybody got there on time, and had a great time. The food was surprisingly good. It was our daughter's birthday, so we surprised her with a cake - delivered by Tigger. She has the two youngest grandchildren, 2mo and 18mo. It was nice for her to get a little attention. Her family flew in from MN. Monday night, we met at the Cape May Cafe for a fun time. They seated us in the alcove in the rear of the cafe. It was perfect for our noisy group. On Thursday, we planned a private cookout on the beach near the Storm-A-Bay. Unfortunately a bad electrical storm forced us indoors. It worked out very well, and the food was plentiful and excellent. The hit was the ingredients to make strawberry shortcake.
One consideration in dealing with the group folks is that everything must be prepaid 30 days before the event.