Re: Western MA
You're getting good advice with all the better-known westsern Mass. rivers. Also, the Farmington in Connecticut is not far from you and is one of the better trout streams in the whole Northeast. The Farmington River Anglers' Association publishes a detailed pool-by-pool river guide that is available from them or the local fly shops. (Likewise for the Housatonic.)
For particular secret spots and favorite tribs, though, you will need to get face-to-face personal tips from old hands. The problem with posting specifics here is that most of these spots can't take a lot of fishing pressure, and once something is up on the internet, it is there for the whole world to see forever.