Moisture impediment yes, but the cause.......
Vascular inhibiting blockages whether tylosis response to viral or fungal presense or a cultural problem like root constriction, or injury to stem of some sort it takes a bit of open-mindedness to pinpoint.
Elimination of each one by one. But the first consideration is your time of year there in NJ. If it's not a early seasonal event, is only indicated in one of several proximity duplicates, you have the benefit of decline symptoms displaying before dormancy. Any vascular parasite inhibiting moisture flow will also take time off for the winter, buying time. I have to doubt that constriction of one of more central root will impair an entire canopy so you have to describe more in detail the effects. It's not unusual however that stresses as you decribe this last season would indicate in one tree while other's appear normal.
One factor to determine wilting effect as oppossed to Fall changes is the outflow of chlorophyll and pigments left behind - if it's not looking like the expected "Golden glow", rather, a crispy leftover void of pigment and moisture, you have apopsis occuring. If margins and tips retain flexibility I wouldn't go digging around for more clues. Odors you carefully detect when you break a stem could provide some more answers after a comparison to stems from the healthy tree. Veinal marks or staining in 1" dia. branches compared to similar tissue from the other trees, etc. Give us some more details. If scorch ends-up as the culprit, some fairly extreme measures should be taken immediately.