You don't want the chests you dig up to be locked. You don't want some of the burial mounds chests to be locked (or is one of the 4 locked okay?). I presume from your earlier question that you don't want some of the keys which exist currently for locked chests to be removed.
What would you like to see done with Lockpicking?
I don't mind if Lockpicks are multiple use, but I also don't mind if they are consumed after use.