The museum folks should have figured out by now that you come every weekend. They should let you know when they won’t be open.
I normally call to find out if there’ll be someone there but since one of the guys last week said they’d be open, I didn’t call. Something came up this week that made them decide to be closed for three weeks. Had I made the usual call(s), I’d have known.
But it would have been nice if one of them had been kind enough to call to let me know.