don't know where you live but if outside london recommend bmibaby flight sale - could fly all four of you there for <£200 in spring. At charles de gaulle take airport internal train to other terminal for TGV station. TGV takes you to disney resort station (disney main gates) faster, more frequently & cheaper than disney coaches. I do mean TGV not Paris underground (staff at airport remarkably unknowledgeable about this).
Book direct with holiday inn / dream castle or one of the other hotels the free shuttles serve.
At Disney gates check for deals, we were going to buy 3 day passes but for 1 euro more got the restricted annual pass (excludes Xmas plus a couple of other dates) which meant we went back for 3 more 'free' days 11months later !