Any hotels in Boston area that I can use rewards points to book a suite?
Doubletree Guest Suites 60k HH. That's right on Storrow Drive, across river from Harvard/Cambridge...not a great spot for Shabbos, IMH.
or, if you are coming after early June, there will be the Homewood Suites
Homewood Suites by Hilton Boston/Brookline, right on Route 9, only 1.2mi from YI Brookline.
Aside from that, I don't know where else you could get a suite with points.
You might be able to get a BRG at
enVision Hotel Boston, an Ascend Hotel Collection Member