What are the mechanics for hiding something that is not yourself?

How can a cleric hide a living body? asked for cleric spells that would keep the body of an unconscious but live comrade unseen.

I considered Pass without Trace, since it targets creatures with no requirement that the creatures be conscious, but then realized that if the companion was unconscious, it could not make a Stealth check, so a +10 bonus to no roll is still no roll.

That got me thinking of the larger issue of hiding things that don’t get their own checks. Hiding a conscious character (as in preparing an ambush) would be the Help action, providing advantage on the other character’s Stealth roll. But what would you do to represent a character trying to hide something that didn’t get its own rolls?

  1. Is there an established mechanism for this? (I haven’t found any). Looking for something would be a Perception or Investigation, but what would this be contested against?

  2. I am thinking this would be a Survival check, possibly Sleight of Hand for anything small enough to fit in one hand but that might presuppose active observation while trying to hide it. Thoughts?

  3. What sort of conditions would be sufficient for giving the character hiding something a circumstances bonus (advantage)? One would be abundant time…so how long?