Didn't somebody have a winch down near St.Louis? I doubt you'll find a Demo winch in the midwest. Cross Country up in Faribault might come to you but it will cost a mint. What you might do is form a group to go and do some site visits and clinics. You might ask them to simulate your field length. No matter what you discover you won't change the minds of the "experts" but you will learn a lot and you'll be suprised at some of those who do convert. Our club started a project about 2 years ago and we will be taking delivery of our winch in a month or so. Our runway is about 3000ft long.
It can be done...
-Doug