overgeeked
Open-World Sandbox
Same as you, basically. I want them to interact with the world as much as possible and their character sheet as little as possible.In 5e, there is no default procedure for secret doors afaik.
I ask my players to describe exactly what they are doing, and if they are doing a thing that might reasonably find the secret door, I'll let them find it and describe how the opening mechanism is hidden (so they could use again if they want). If they are doing something sort of close, then I'll let them roll perception or investigation.
How do you handle?
Have the players describe as much as possible.
If they'd find the secret door with their described action, they find it. No roll required.
If their description is close but not quite right, perception or investigation depending on the description. Best guess the DC from their description and how far removed it is from the "facts" of the secret door.
If their description wildly off, wrong side of the room, looking in the wrong direction, etc, they don't find it. No roll required.