Any field without “strip” in the name e.g. stubble field, harvested pea field, newly sown barley field, cattle or sheep grazing field. Or “beach” if you want to lower the odds of bending your machine. As far as semi recognised landing sites, a mate has a ski jump type strip set up on the face of the Glens at the back of Auchenblae with power pylons just below the leap off point. Always a bum clencher on departure.