I know some people have done this. Others consider it blasphemy - but don't flame me.
I planned our last trip (October 2001) because it was the last Autumn before our oldest child started kindergarten. We did WDW commando style (9 consecutive days). We'd like to go again but probably for only 6 - 7 days, skipping Animal Kingdom.
October was the perfect (best, IMO) time to go and we'd like to do it again. Any regrets from anyone that has pulled their kid out of school for a week?