Looks like the Glacier National Park Website's Wilderness Camping Page was updated on March 7th regarding the status of Goat Haunt in 2020:
U.S.A./Canada International Border Crossing at Goat Haunt
It remains uncertain if the USA/Canada international border at Goat Haunt will remain closed in 2022. U.S. Customs and Border Protection (CBP) is the unified border agency within the Department of Homeland Security charged with the management, control and protection of our nation's borders at and between the official ports of entry. To verify border status between the USA/Canada international border seperating Waterton Townsite CA, and Goat Haunt USA, contact CBP at (202) 325-8000. If CBP has not decided to open this border crossing by the time you are submitting an advance reservation for a wilderness permit, do not choose an itinerary that begins or ends at Goat Haunt or Waterton Townsite. Regardless of international border status in 2022, Goat haunt Shelters will remain closed in 2022. Hikers will still be able to hike through the Goat Haunt developed area to other wilderness campgrounds.
I am curious why the Goat Haunt Shelters will remain closed in 2022. What is about the shelters that keeps them closed when other "normal" sites are open? I'm probably missing something obvious but...
Scott