Hooray for being in the teens ! You and Tim are going to have a fabulous time and deserve this time to yourselves. Just plan on taking the kids next year to see the Christmas lights.

I know how that motherly guilt can be.
I love the fall but it is definitely nice to know you will see warmer temperatures soon.
I think whatever you decide about the dining plan will work out. How many nights/days are you doing the Food and Wine festival? That might help you with your decision. If you plan on eating/drinking your way around the countries more than 1 night the dining plan might not be worth it. I had it when we went last year but it was free dining.
Can't wait to see the Halloween pics !