sapblatt said:
Well, I am no expert on this compared to others here but at your speeds I would think you could complete the White MOuntains AT in three weeks.
I think that's way long for your speed, I'd say closer to 2 weeks for the classic White Mountain AT section. I've hiked all of the NH AT and about 3/4 of the LT.
The AT through the Presidentials (Crawford Notch to Pinkham Notch) will take you about 3 days - 4 at the most, even if you climb all the 4Ks nearby AND pass every white blaze.
I might consider the classic WMNF AT section to run from Glencliff to Rt 2 Shelburn. This gets you over/past all of the WMNF 4Ks along the AT route, and is certainly what makes New Hampshire so impressive as an AT destination.
To hike the whole of the "White Mountains" AT, you might extend your trip up through the Mahoosucs, ending at Grafton Notch, ME.
What I might suggest, though, since you have a lot of time, is aim for the whole of New Hampshire, starting down at Ledyard Bridge and the Vermont border in Hanover, and taking out at Carlo Col, just past the Maine border, 161 AT miles or so. Even averaging 10 miles per day, that's still well under 3 weeks. You get a nice warm up from Hanover to Moosilauke too. Note that in the toughest of the White Mountain sections your mileage may be as low as 1/2 that of the easiest Hanover - Glencliff miles, but if you can average 10-15 on the LT you should have no problem. My 70 y.o. father hiked it in under 3 weeks (including some longish car spots), so there you go.
If that doesn't seem long enough for you, you could extend my suggestion forward to Grafton Notch (as above) and/or start further back at Maine Junction in Vermont, giving you a longer "warm-up" and making Hanover a major resupply stop.
I would not recommend depending on substantial resupply at "stores" at the Lafayette Place, AMC huts, Mt. Washington, Pinkham Notch or the like. I think you'd find the selection very limited and the prices prohibitive if you are really looking for many Calories. Pinkham does have a nice AYCE breakfast, however. The usual big resupply stops are Lincoln/N. Woodstock and Gorham, both pretty convenient to the trail.
You best trail resource is going to be the
ATC NH/VT guide and map set, though you might also want to look at the
Online Companion for road crossings and their resupply resources.
I do hope that helps . . .