My son knows someone who is up in that area. He said he'd give her a call and see if she can give any more info. The reason I said Redgate Road is because if it
was the place beside Winona Manor, then google maps has a redgate road that looks like the one! Go to
http://maps.google.com and search on "redgate road, mirror lake, NH" It's a dirt road 7 miles north of Wolfeboro on the left. I know the place next to Winona was called Red Gate, just not sure if it's the one you're referring too. Anyway, if I hear more I'll post. Have a good day.
k