Survival Favored Habitat is an aspect of the Survival feature.
Obscuring small sites and minor features can be done using Stealth or Survival, Advantage at the highest common level of either if both.
Frame of Reference: All Skills are bound by the character's Setting (physics), and the details that their culture/society's Science (gathered by Technology), direct experience, and/or collective Records are capable of revealing. A character may not be able to apply their full measure on a different world, with different species and tools. With a common frame of reference, multiple specific Lores can stack.