I like the point you made about Husband going camping. THAT, I can relate to. That helps a lot. And no, I don't think I'd object to it as much because I can relate to it.
And Wild at Heart was on my mind while all this was going on.
I do think that him telling me sooner that he's going to spend the night out would be easier for me. But I shall have to prove to him that it's safe for him to tell me.