The Super Cub is a rather slow flier. It could probably be flow in an area the size of a baseball diamond, although I don't you'd get much fun in that small of an area.

If your flying area is that small, I'd suggest looking at some of the very slow fliers such as the slo-v and slow stick type planes.

http://www.hobbyzone.com/rc_planes_parkzone_slo-v.htm (slo-v)
http://www2.towerhobbies.com/cgi-bin...&I=LXPCG4&P=FR (slow stick)