I've done the "ask a farmer" thing, up front and honest. Telling them I just want a place for a tent. No fires, no damage, gone in the morning. Rarely turned down. Occasionally been invited to stay in the barn or house. Often given a meal in exchange for a road story.
"Though no one can go back and make a brand new start, anyone can start from now and make a brand new ending." -Carl Bard