Insa, Sprinfield is by far the easiest on/off of I-91 that could be (especially if headed south, but either way). Be careful if you gps, there are 2 Insa's in Springfield, I found out the hard way that the med-only is farther off the beaten path - and I wanted rec!
I've also shopped NETA, Northampton, also close to highway. They put on more sales, flower in particular and depending on your timing, often better pricing than Insa.
When at Neta, I also look for Live Rosin they sometimes have. Listed with vapes for some reason, but it is a dabbing form, in a jar. "Southy Adams" brand.
Figure tax to add about 20%.
My very first experience at a legal store was Neta Northampton a few years ago. My buddy and I drove up cautiously, there were several cops milling about at the entrance to the parking lot. One stopped us, and we rolled down the window, expecting the worst, naturally. The cop smiled and asked, "Medical or Recreational?" and directed us to appropriate area for parking.....