Originally posted by TooTall1:

Originally posted by Rocky:

Great! Thanks! So you could leave the key at home until you move to the next crypt?

Yes.

I heard one player say they explore the entire swamp area they find, mapping and unlocking all crypts, then leave the key at home.

That's what I do. These are all marked unopened because I'm just exploring and don't need iron.
https://steamcommunity.com/sharedfiles/filedetails/?id=2667704986