The problem with Holden is that its hard to get to (as a location) and one way in/out. My friends live there and regret it. They are planning on move back eastward to Stow/Concord/Hudson/Sudbury.

For an autistic child in any school, there are a lot of differences in needs and delivery + how much of fight it will be to get services. Some kids thrive with ABA and some hate it. Knowing how your kid responds to the structure of a particular program is important. If your kid is 2E -- there are not a ton of programs that really excel for that mix.

You might do well to join the two Facebook Groups "Massachusetts Parents of Autism" and "Autism Moms of Massachusetts". They may have a lot to offer.

Edit: My kid is not autistic, but has overlap (call him autism adjacent).