Loving your PTR and your outlook on life - we are the same age and our kids are 17, 21 and 23. We have been living for today for a while now after losing my mom when she was only 47 - swore I would never wait to do anything if we could afford it now, so we bought
DVC 11 years ago and have never looked back. Now, with only one child left at home (and not for long) DH and I find ourselves travelling alone quite often.
Christmas is absolutely amazing - so glad you are seeing the Candlelight Processional. If there's a narrator you really want to see, just stroll by at one of the times and stand in the back - you can see and hear great without standing in line or paying for another dinner.
Also, DO NOT miss the Osborne lights at DHS, I could have walked through those every night!
Glad to see Whispering Canyon on your list, that's our favourite. And you get to see the huge tree in the lobby of the WL, amazing.
Make sure you go to the Grand Floridian (just take the monorail when you're at MK) you have to see the huge gingerbread house in the lobby!
And keep an eye out for rentals as it gets closer for your car - we got a full-size for a week for $86 with Alamo insiders code and coupons from mousesavers.com (think it was an American Airlines code or maybe Visa).
And if you have time for Jellyrolls, that's our new favorite 'activity' every trip.
Lastly, if you're at DTD and want a great place to eat, try Raglan Road - great atmosphere, good food, and we love watching the Irish dancers while we eat.
Happy planning! Can't wait to read your actual trip report when you get there!