In case anyone is considering Cabot Inn, I'm posting this email that I received to save you time. They don't have anymore rooms:
I'm sorry but I don't have any rooms available for the porcupine festival. We don't do a cancellation list but if you'd like to keep trying back we are more then happy to keep checking to see if we've had any cancellations. Hope you have a nice day.
Cabot Inn & Suites
200 Portland Street
Lancaster, NH 03584