Well let me see if I can be of some assistance.
First of all, since you're traveling with a 4 yr old and an infant, I'd say that a MK Resort will be better suited for you.
Second, since it's Christmas time, I'd say choose the Wilderness Lodge. Yeap, that'd be my pick

. If it was any other time of year, I'd say choose the Poly for Monorail access, which means easy traveling for your young children. But since it's Christmas time, I don't think the monorail can beat the beauty of the Wilderness Lodge during this time of year.
Finally, if you don't want a deluxe resort, I'd say pick Port Orleans:French Quarter for your moderate, or Pop Century for your Value.
Hope this gives you a good starting point

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