If you're in Nassau, there's the Mother's Center of SW Nassau that meets in the Baptist Church in E. Rockaway. It has a lot of mainstream Mamas, but there are also quite a few crunchy mamas. It's a great group with a lot of activities, a good preschool program, activities for moms (like yoga, book club, knitting) often while members provide child care in the same building, etc.Â
Â
There is the Natural Mothering Forum which meets up in suffolk county...they have a yahoo group you could search for. There is also a LI babywearing group that probably has some cross over with these other groups.  As far as "eco-friendly" towns, unless you go out East, I think that's harder to find.... There's a farmer's market in RVC but I'm not sure if it's sat or sun morning. I think there's one in Westbury, Amityville I think...there is also more than one organic CSA that deliver weekly veggie shares to various areas.
Â
There is a Long Island thread in "finding your tribe" from long ago. It may be archived now. I don't post often any more so am not sure...What area do you live in so I can direct you to more stuff?