LT canister fuel availability
I know that you can get canister fuel in Manchester Center and Rutland. Further North it is a little less reliable. I think you can get it in the Waitsfield area if you resupply near Appalachian Gap, I believe the local gear store is called Clearwater Sports look them up to find out. I would think that there would also be some availability in the Stowe area but off the top of my head I can't recall the names of stores up there. North of Maine Junction seems like there is significantly less of the easy town access and trail town culture though I have never tried to resupply on the Northern LT in the AT style. Check out the Green Mountain Club website and their End to Enders guide they should be helpful. However if you do decide to go with alchohol I think you should be guaranteed to at least find HEAT pretty reliably even in small general stores and gas stations. .Have fun