Been there and done that !!!
Had a trip over there in 2010 -headed over from Musket cove after checking'magic seaweed' which said the size was 2-3 ft and building ....This was before it was all opened up .
Started in shoulder high nice waves and then out of nowhere comes a clean up set in the 6-8 feet range and mowed us all down .Pretty much increased in size from there and was unsurfable by us mortals for a couple of days.
It is a scary wave when it gets big as it seems to 'wrap in' on you down the line
You had to make sure you had an exit point or it was carnage.