Q: When the Camouflage Rule goes away, do camouflaged Keepers stay hidden?

A: When the Camouflage Rule is no longer in play, no-one is allowed to have any hidden cards. The default is that no Keepers in play are hidden, and only the presence of the Camouflage card gives you permission to hide something, so when that Rule goes away, the game goes back to the default of all Keepers showing.