Your kids will love SAB, they are the perfect age to have fun with the slide. We loved the walking distance to Epcot, although I think my kids might have preferred being w/in walking distance to MK. We ate at Beaches & Cream 2 times--my kids loved the ice cream there and if you're on the meal plan, you get a dessert with your meal and you could get any ice cream creation on the menu, with the exception of the Kitchen Sink, which is something to see. Definitely do the Cape May character breakfast and the evening buffet is good for a night that you want a good meal with veggies, fruit, etc. We did the character breakfast the morning that we left which seemed a good way to say goodbye.
We were there for 7 full days and still felt we missed several things, there is so much to see and do. This was our first trip and now I definitely want to go back again. Have you ever been at Christmas?