Are there any additional activities that we could do at SSR or anywhere else on property?
The fireworks cruises are wonderful. We've done it twice, and it's certainly the most relaxing way to see the fireworks. Great fun!
Many of the backstage tours do not require park admission. I've never been on a tour we didn't enjoy. Since you have so much time at your disposal, you could also consider the Backstage Magic Tour -- an all-day, multi-park tour. Check out the options here:
http://www.wdwinfo.com/wdwinfo/tours.htm
SSR offers a flower arranging class once a week, and you get to take your creation with you. I think it's $50. I've always wanted to do it, but haven't ever taken the time.
Speaking of that, be sure to check out the activities schedule they give you at check-in. It's always a very full page of things to do.
We really enjoyed the horse-drawn carriage ride at Port Orleans.
We went to Fantasia Gardens to play mini golf on our most recent trip. That's always fun. I'd recommend it after the sun goes down, though. There's a really good
DVC discount both at Fantasia Gardens and Winter Summerland.
Outlet shopping (off property, but the ones on SR-535 are very close to SSR by taxi)
Pool hopping
Water park / Disney Quest
Check out a board game from the Community Hall (or pack your favorite from home)
Billiards at the Turf Club
Tennis or Shuffleboard (check out gear at the Community Hall)
Picnic/cookout -- Community grills at Congress Park and Grandstand. Check out utensils from Community Hall.
Fishing excursions:
http://www.wdwinfo.com/recreation/fishing.htm
Hire a local photographer to take some family portait shots -- SSR bridge, Grand Floridian or Poly Beach, other picturesque spot
Bibbidi Bobbidi Boutique:
http://www.wdwinfo.com/downtown/marketplace/index.htm#bibbidi
Spa day
Ft Wilderness Archery Experience:
http://www.wdwinfo.com/recreation/archery.htm
Disney Transportation: Boat Ride between Epcot and Hollywood Studios / Monorail from Transportation & Ticket Center to Epcot and back / Boat ride to Downtown Disney
Pirate Cruise:
http://www.wdwinfo.com/just_for_kids/piratecruise.htm
Wonderland Tea Party:
http://www.wdwinfo.com/wdwinfo/dining/diningdetail.cfm?Restaurant.ID=227
Welcome Home Wednesday
Downtown Disney AMC Movie Theater -- they have some theaters with in-show dining now
Bay Lake Tower's Top of the World Lounge for fireworks (It will be open to all DVC members while you're there. You don't have to be staying at BLT.)