Hi Allison!
Yes, you should be able to ride as a family on many of the rides! When my daughter was an infant and my son was a toddler I brought a sling to Disney & would pop her into the sling so that my hands were free to hold his hand as we got onto rides...I don't think most people even knew I had an infant on me!
Each Park has a fabulous place where you can nurse, change diapers, and relax with the baby called
Baby Care Centers. Grab a map as you enter the Park and you'll see the
Baby Care Center clearly marked. It was always the very first place my family would head to when my kids were little and we made frequent visits to it throughout our days at the Parks. The
Baby Care Centers have comfy chairs, kitchens, clean bathrooms, space for the older kids to play! When I was nursing my baby that place was totally my
BFF!
There are tons of Christmas activities going on! From
MIckey's Very Merry Christmas Party to the breathtaking
Candlelight Processional in Epcot! Here is a link where you can read about the Holiday happenings and plan on what you'd like to see:
Walt Disney World Holiday Events 2010