As far as suggestions. The main thing you need to worry about is waterproofing and ventilation.
It does rain at Disney so make sure all the seams on that tent are thoroughly sealed and seal the fabric of the tent with a Scotchguard type stuff (many camping brands are less expensive than Scotchguard).
Ventilation is very important at WDW year round because of the humidity. In the summer all your stuff will be soaking wet if you don't open that tent up most of the time, in the winter if you keep that tent closed up, the same thing you will freeze yourselves with the humidity you create just by sleeping.
There is ample electricity at Ft. Wilderness so bring a couple 40 ft outdoor extension cords and a few power strips and you can run fans, lights, computer, pumps for the air mattresses, electric blankets, mini fridge (great thing to bring as ice is expensive) cell phone chargers, camera chargers, etc.
Make sure "each" person has their own shower bag/toiletry kit so you can all use the comfort station at the same time.
The same as the other poster stated, I never cooked while tent camping as packing cooking stuff was a pain, plus there are SOOOO many wonderful restaurants at Disney. I only bring minimal breakfast stuff even with my camper.