Cross wind take offs will be a problem without the rudder for ground handling. Steering only with nose wheel will be very dicey. Once in the air, you will be better off with the ailerons. If you go with the rudder, the wings should be very straight with no warps so that the plane does not have any roll tendency.

Better still upgrade to a 4 channel. Soomer or later it will have to be done[8D]