Paul, I think you will really like Branson, and I hope you can come. It's a great family town. 
I know you just got back from DisneyLand, so you may not want to check out the amusement parks, but there are also some really spectacular family-friendly shows that your kids would love.
Jim has found a location for the meeting that is like a palace overlooking the lake, and they have child care available:
http://www.chateauonthelake.com/FamilyActivities.cfmHowever, if you want to be closer to the shows and things, there is 
very reasonably-priced lodging in town (we have spent a lot of time there with our kids in the past).
I agree that it would be fun to meet all the folks we talk to on the phone. I have heard that Jon may be bringing some AC folks with him to Branson.