@civicbud — I’ll be doing the LT in September to finish my “Triple Tiara” and (hopefully) avoid the brunt of the Northeast’s vibrant biting-insect season.
Since you’ll be hiking right through the worst of the bug season (oh joy! both mosquitoes AND blackflies!) you might want to switch out your hiking shirt (capilene) for a treated long-sleeved nylon button-down shirt that bugs can’t bite through. Â Remember, the bugs can be so bad in the Northeast that moose have been known to commit suicide from it!
You might want to include some sunglasses — while a lot of the LT is “green tunnel”, there are times you’ll be above treeline.
From what I’ve read, bears really aren’t much of a concern on the LT — but rodents ARE.  You might want to substitute a mesh rodent-proof bag for your bear bag.  You could keep the cordage/biner, so if you want to hang, you could do so with the mesh bag.  This will be especially important if you’re planning to use the shelters, where the mice have apparently taken trapeze lessons from Cirque du Soleil so that they can shimmy down cords to get at your food.
Your first aid seems incredibly thin — no Vitamin I, no Ace bandage, no hydrocoloid bandages — no room for mishaps!  I see a headnet but no bug repellant.  I generally refuse to use it myself, but conditions may warrant it when you’re out there (god knows I *should* have been using it last July in the Sierras’ massive mosquito invasion).  Also, VT is tick territory (including Lyme Disease), so you may want to wear long pants (permethrin-treated), or at least treat your gaiters.  And you & your wife should do regular tick checks at the end of each day.
Have you looked into resupplies on your esbit? Â Do you know for sure that it will be available? Â Also, I’m not sure if there are fire bans in VT that might prohibit esbit use (I don’t pay attention, because I use a canister stove).
You won’t need the X-Therm — the X-Lite should be fine.
One last thing — you might want to include some type of belt-like thing that could be used to tie your poncho around you if it’s rainy AND very windy.
Enjoy your trip!