I dont think that would be a good idea, unless you have some previous experience. Try for an electric, or maybe even gas heli for that yard, but to do more advanced things than hovering around you would proabably need something bigger, like a club, or soccer field. A parkflier would fly in there if you had enough experience to be able to "contain" it, but a sudden gust of wind, or brain lapse, and it will be in the trees.