I think that field may be within the 5 mile zone from the boarder of the airport. I think it's FAA part 101. Yup
101.13 Operating limitations.
(4) Within five miles of the boundary of any airport.
Come to think of it I violated the heck out of this snow kiting this winter.
Me = 145lb + 6" + (15M spd3 dlx, 11M x-bow, Kahoona 9.5M, 7.5V2) + Zap skim, home made 133 orange carbon aka Bifrost, home made black 170x50 cabon racing light wind tt, 133 wide tip carbon) + red helmet