I'm headed down March 12 myself.
I am only doing one park day with a hopper
at Disney.
I would plan.
Saturday March 12 --arrival-unpack--(D.S.) Disney Springs--kind of get your feet and legs stretched for walking. Check out the
Lego Store,Splitsville Bowling Alley and Dine In Movie Theatre. If going to Disney Springs on March 17th wear "Green".
Sunday March 13 ---A.K. (Animal Kingdom) Day.
Monday March 14 --- Rental Home Activities / Orlando area activities.
Tuesday March 15 ---M.K. (Magic Kingdom) Day.
You could reverse your A.K. and M.K. days, but I think building up to M.K is always nice.
Have a wonderful Holiday
Hugs Mel
P.S
You probably already know but here are the Baby Care Center locations
https://disneyworld.disney.go.com/guest-services/baby-care-centers/
A.K. Wilderness Explorers
https://touringplans.com/animal-kingdom/attractions/wilderness-explorers
Pick up a cheap pair of binoculars for DD at the dollar store before you leave and she is good to go exploring Disney style.
Buy tickets for Disney Hot Air Balloon ahead of time if going on their Characters in Flight,,,
$10.00 instead of $18.00 dollars:
https://www.groupon.com/biz/orlando/aerophile-orlando
with the CAD so low every bit helps
Cash in 95 Airmiles for $10.00 Starbucks gift cards which can be used at the all the Parks and Disney Springs..
Tie a bandana on each family member's arm (dollar store again) and become M.K. Pirates in Disney's Pirate Adventure "Treasure Of The Seven Seas"
https://touringplans.com/magic-kingdom/attractions/a-pirates-adventure-treasures-of-seven-seas