I think I'm going to have to get some trailer ties. I will need them eventaully when I get my own trailer anyway.
She will tie to the hitching post for hours and not move except to swat flies. But there's no grass under her there. She also will not try to eat when being led unless told she may. So I know she can resist the temptation haha. She also ground ties pretty well when there's no grass under her.