How to get replacement reservation for Many Glacier?

I had a campground at Many Glacier from the 1st-5th but now it’s closed at least until the 2nd. I can change the reservation to 3-5, but I’m both unsure of whether there’s actually a chance of it opening back up by then as well as what to do otherwise. I got an email from the NPS saying that they can accommodate us at Avalanche or Rising Sun, but I don’t see any availability at either. Not sure if the email was implying they could help move the reservation, but there’s nowhere to call afaik. I could get a hotel, but there’s also a lot booked out. What are others doing as a stopgap?