It might be easier to see what you already have in your list, as some things are obvious, and others not as much. Except for the critical items you can survive anything for 2 or so days. There are must haves (shore power line, sewer house and sewer doughnut, cable line, drinking water hose, bed making stuff, bathroom stuff, kitchen stuff like paper towels and a paper towel holder, microwave safe containers, dishwashing soap, bottle & can opener, coffee maker, butane lighter/matches for oven and campfires) should haves (surge protector for shore power, adjustable water pressure regulator, tire monitoring system, snap pads in lieu of jack pads or else just jack pads), and would love to haves (roof mounted satellite TV, golf cart, fill in your dream wish list here...) All kidding aside Ft Wilderness is a fun shake down trip, we did Ft Wilderness for our shake down. The campground has food and limited RV supplies, so if you forgot something essential--like band aids or sewer doughnut, the store will have it. A Camping World is a few miles away for any serious preparedness issue. What is great about being at Ft Wilderness, in addition to the obvious, is you will know right away whether or not your TV's have a QAM tuner, as that tuner is needed to receive cable channels at the campground. If no cable for you, there are lots of over the air channels and you will know what you want to look for on Prime Day or Black Friday!!
Hope you already got your alignment and CHF done before your trip, and a steering stabilizer (like a SafeTPlus installed).
Have a blast, and wish I could be there too.