I live in Cold Spring, 20-30 minutes from those towns. So I can't help too much. But I know a few things.
Carmel is a neat little town center, surrounded by strip malls and ruralish areas. Brewster is the same, but with a latin immigrant population as well (or at least that's how it was 10 years ago when I lived nearby for a while.) I'm pretty sure there is an attachment parenting group in the Carmel area, though I didn't find them with a quick internet search. If you pm me I may be able to connect you with a crunchy mama who lives in that area.
Brewster has Green Chimneys Farm School, a neat place to visit with your kids. They have preschool and day school too. I also know a great beekeeper in Brewster.
Sorry not to be more help. Best wishes!