It's clear that the voyage of the James Caird is one of the most stupendous feats in terrestrial adventuring, and that tends to get the lion's share of the attention just because of how improbable that feat was.

In Shackleton's memoirs (South) on the expedition he does go into length on the Ross Sea Party. If it's overlooked, it's only overshadowed in the modern imagination because the expedition to rescue the Ross party was less extreme and involved less hardship than the sinking of the Endurance and then the last-ditch navigation to South Georgia Island.