Given my feelings about the long journey to Cambridge, I'd say don't come in unless you really want to be there, Chuck. It should be a good time, and I'd appreciate the help/company, but if you've got other stuff you'd rather do, save your time for things closer to home.
I've had very few people commit to helping, but I find it pretty hard to believe that no CORP folks will be there, so I am guessing we will usually have a few people hanging out.