There's a minor discrepancy in the location of these endeavors at
the Harding Ice Field; given Bear Glacier is quite a distance from
the Exit Glacier location, even by snow machine. Or helicopter.

An emergency cabin (no heat, just shelter) has been in place at
the edge of Harding Ice Field where the highest trail from Exit
Glacier route ends. This is a study structure, prefabricated of
fitted treated wood with cables holding it down; as the wind
& most weather conditions there (west of Seward city) are bad.
They seldom are really all that good. This is where the ?-fated
trekkers way out at Bear Glacier should have gone for practice.

Yul Kilcher & a group of Peninsula adventurers, trekked from
Homer to Seward side of Harding Ice Field in early 1960s; made
camp on ice, + did well because they knew it's always winter there.

The persons in the story linked in comments, are known to me;
and I've been here for more than 55 years, in semi-rural Alaska.
Nothing's left of any older camps.