Yeah, it appears to be Conn Valley. And I do not think there are restrooms there. There's a boat launch at the other side of the lake that does have restrooms.

We go over White Cottage, but continue straight across Deer Park (careful! Traffic!) onto Howell Mtn. So I haven't been into Angwyn either. There is a school there which has water fountains. Other than that I am no help.

FUN descent if you go the other way (UP "old" Howell Mtn., and down "new" Howell Mtn. instead of Ink Grade - this is the K-ville double route and boy is that downhill fun!!