looks like they are coming near you but not to MA. Check
www.pollstar.com and enter Yes and select artist itinerary in the upper left.
Definitely go see them, they are sounding great. I saw them about 3 years ago and it was awesome. They were my 1st concert in 1974...Patrick Moraz was on keys for that tour.
Chris was a major influence on me early on. So much great stuff, Heart of the Sunrise, the Fish, Close to the Edge, Perpetual Change, Long Distance Runaround, I could go on and on...