How exciting that it will be a first trip for all of you! (Well, I know you said you've been before but not for awhile!). Your family is so precious.
At Universal you have to have butterbeer!
No Animal Kingdom day? There aren't great meal options there, but it's a short bus ride or drive over to Animal Kingdom Lodge which has incredible eats, if you decide to change anything
For the CM situation, I would take a bus to MK and then walk to the Contemporary and back to MK after. Driving to MK is a pain anyway because you have to park at the TTC and take a monorail or boat anyway.
Did pick a pearl in DTD and didn't wait at all!
As someone mentioned, you sadly can't get a FP+ for both Soarin and Test Track. I usually make one for Soarin' and then just go to TT first thing in the morning. I don't mind the wait as much at TT because some of that time is spent designing your car and all that, so it always feels like it goes pretty quickly.