Good stop over spot
We stayed at Wilmington Notch for a night prior to backpacking. It has a great location (beside Whiteface) and is open to both tent campers and RVs. Campsites are nice but not huge and all in a circle so you are definitely seeing your neighbors. This is a great spot for a car camping/ stop over but I would not consider it a destination. Not much going on besides fire pits and fellow car campers.
Definitely make reservations in advance during the summer!
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Month of VisitSeptember