Congratulations on your first trip and your upcoming anniversary!
Your kiddos are adorable!
A few questions/suggestions:
**Do you have activity bags for the kids for the car ride? I made each child an activity pack (coloring books, washable crayons, DS/Leapster, etc), plus we had a DVD player that plugged into the cig lighter. I know some kids are better than others with long car rides (we have about a 9-10 hr drive ourselves).
**Do NOT forget to sunscreen yourself every AM. It's easy to forget when making sure kiddos are protected. (I learned from experience.)
**Don't forget OTC meds!
We stayed at Movies in 2009. We ate in the food court quite a bit that year ... and I remember having a steak salad and it was sooo yummy. No one in our group ever complained about the food.
If you go to DTD, I suggest Wolfgang Puck Express. Wolfgang Puck is our must-do dining experience every year - and DH would totally throw a tantrum if we don't eat there.

In my opinion, they have the best food. I do hope that if you try it, you'll agree and not say, "Some crazy lady told us to eat here and it stinks!"
I love that you are making multiple plans so you can be super flexible! It's really hard to tell how little ones will be in the heat and excitement!
When you do Epcot, Spaceship Earth might be crowded early, if the lines are long, check back later. Most people gravitate to it first, so lines are usually shorter later in the day.
I am so jealous of your Rainforest Cafe rezzie. We would eat there every year if it was on the
DDP. I had a coconut shrimp dish (I hate coconut) and it was MMMMMMMMMMMMMM!!!
And I'm jumping on the TSM FPs will be gone early - and the line will probably be 90+ mins long all day. My fingers are crossed that something will work out great and you'll get a ride on TSM.
I love the Scavenger Hunt idea! I think it will be sooo fun. I can't wait to hear how it plays out!
Did you find all the information you needed on FPs and Transportation?