Girl Scouts Hudson Valley Council Service Unit 66 Welcome to Service Unit 66's  website. We are a part of the the Girl Scouts Hudson Valley Council which serves us and a greater geographical area. We serve girls in  Halfmoon and Clifton Park, New York.  We currently serve over 250 girls in 26 troops and over 60 adult volunteers. By being a part of Service Unit 66, our girls are offered a fall camp weekend, Mother/Daughter Events, Father/Daughter Events, Dances, and an array of Community Service Projects and other events.