The only CSF that I know of in Massachusetts is Cape Ann Fresh Catch. They do deliver near me, but I haven't tried them. One reason is that fish like the Spanish Mackerel or Bluefish just wouldn't work for me.
This year I'm doing a half-share in a Veggie and Fruit CSA from a local/regional farm. (I grew up with one of the farmers, which makes it even better.) After thinking about it, I upgraded our CSA to include the Cut Flower option. Beginning June 7 we get 20 weeks of a half-share in the Veggies and Fruits. Somewhere in there we also get 10 weeks of Cut Flowers. (Question - If I don't personally shop for or order them, do I still get full brownie points for 10 weeks of cut flowers??)
One nice feature of this CSA is the donation bin. If there is something in your bin that you don't care for then just move it to the donation bin. The contents of the donation bin are given to a local food pantry. If you are away and can't pick up your bin then you have two choices. One is to give your empty bin to a friend, and have them pick up your full bin and enjoy the contents. Another is to not pick up your bin, and the entire contents will be donated to a local food pantry.
I'll let y'all know in the Fall how this has worked out for me.