Bay State was a large show with a wonderful selection of dealers, especially when it was in Boston. US, colonials, world, ancients, medals, everything.
Devens was previously the Westford show. It was large for a monthly show, and years ago there was a diverse selection, but gradually had little besides fairly common US, and stacks of slabbed Morgan dollars. However there are vest-pocket dealers lurking in the lobby areas that are very knowledgeable and have some of the better items.
It's worth going if you don't have to travel too far. Could be quite different after such a long break. I expect it will be well attended and dealers will have lots of fresh stock. Maybe some new dealers and some old ones gone.