It will be interesting to see how high I can get the front end (with or without a trench at the back-end): I don't have, what I call, a high lift "farm jack", but I do have 2x jockey wheels that I can crank up one-by-one with an increasing number of "packers" underneath each time. My main concern is when the brakes are released with the nose lifted up: I think I might drive a decent spike into ground up front and tether caravan nose to that before releasing brakes much-less venturing under. (There is just enough room for my body-frame when 'van is in a normal position, but I'd be the one needing a rope tied to me somewhere to drag me out if it all went wrong. Lol)