Originally Posted by
Tony Marley
I put the ground sheet under the tent. What I normally use is a "space blanket," the plastic and reflective foil survival blanket. It is not terribly heavy, is quite tough, and works well under a two-person tent.
I've carried an emergency blanket for years, never thought of using it as a ground sheet or anything else. Ask and ye shall receive

That's why I like Preacher Casy so much in The Grapes of Wrath, he said "I ain't a preacher no more, a preacher's got to know, I don't know, I have to ask". Thanks for the idea.