"Will Broadway go on? Yes. Will it be to empty audiences? Likely."
Yes if you are looking to see Book of Mormon from an orchestra seat, Sat night is probably your best chance. Same for Lion King or anything else as popular.
Some of the best seats I've ever gotten were courtesy of two feet of snow on a Tuesday night having purchased from TKTS back in the day. My biggest fear is mass transit (train service) losing power. I suppose I can always go hang out at the Marriott or at a friend's place.
"Sticks and stones, sister. Here, have a Valium!"