Following suggestions on this board, I called my credit card companies today to get my 4-digit PINs in case I needed them. But since I hadn't previously requested them, they must be mailed to my house. They won't arrive before I leave.
(BTW, Bank of America said that their CC PIN is only good for an automated cash advance; it can't be used in a purchase. I didn't ask the other companies.)
I don't anticipate any problem not having the PINs, since we'll go armed with multiple CCs and ATM cards, but I thought the timing info might be useful to someone else.