wdw must do's

Hello all! My husband, our five kids (9,8,7,5,4), and mother-in-law are headed to the parks in December! Just curious if you could only choose two parks for Christmas time, which would it be? Our plan was to spend one day resort hopping to check out the decor and DS, go to MK on a party day...

This October will be our first trip EVER to WDW! 9 nights and staying at POR with 8 day park hopper...possibly adding waterparks...we will play it by ear...or forecast closer to trip date. I would LOVE feedback as to MUST DOs while we are there. We will have 4 adults, 39, 44, 60, and 65 yrs and...