Wow -- didn't know I'd set off a firestorm by using the word "aging" lol. I didn't mean it to sound bad at all. I just meant that they tire a little more easily than they used to, and that my dad has some health concerns associated with getting older. Anyway, my son LOVES Sci-Fi -- it's his favorite restaurant at WDW, so we have an ADR for there. And they will love being there with him -- he is the one grandson who has always (and still does) spend lots of time with them. He has my dad wrapped around his finger. I like the idea of the Behind the Seeds tour -- I had already thought that my dad would really love Living With the Land.
LOL! It's that "aging" thing Missy!!!! LOL!
My DH and I took the behind the seeds tour and it was a highlight of our trip that year. THere can be a lot of walking during the tour, so that day I would plan it early in the day so if your Dad feels his gout, he can go relax or go back to the resort for a while. The tour is worth the time though, and the CM's who conduct it are wonderful. If people are interested in any aspect of their discussions, they will take the time to expand on the topic.
One of the things I wanted to say is that as a grandparent, the best gift I ever was presented with is my Granddaughter Kady. She hung our Moon, and is the sun in our lives, just as your son is to your parents. FOr your parents, the best and most memorable aspect of this trip is going to be the time spent with your son. You could park them at the pool and if your boy was there, the trip would be the best ever. So don't try too hard to plan the perfect trip, it is perfect already.
When you are planning, I would first consider an
ECV in Epcot and perhaps AK. These parks involve a lot of walking, and if your Dad is uncomfortable he will suffer getting from one place to another. I also would try to be in the parks for the fireworks displays if possible. I would also scope out possible CS restaurants in each park that offer a good opportunty to rest and have a snack.
You have the party planned and I bet that will be one of the best memories for your parents. There is something special that happens during the Holidays in WDW, and your parent will experience that with their DGS. It sounds like your son is as invested on their happiness as they are in his, so at this point I would relax.
Just remember that you can never pack it all into one trip, so don't try. It is not the number of attractions, shows, parades and displays your parents experience that will make this trip the one of a lifetime. It is the time you spend together in a place that your parents never dreamed they would go, and the care you have already invested in their comfort and pleasure that will catapult the vacation to "Best time ever@"