Well, chances are the White Mountains will be white at that time of year... but so will the Greens.
The first or second week in October would be perfect if you have never been to New England during the fall
Tell them to rearrange their schedule.
Of course you can. I can probably find facts that dispute everything you find links for. Just because you or I feel strongly about an issue doesn't make it a fact. We don't all value things the same or have the same political views.