If you're using that Goldberg airfoil then your canard should also have some camber to the airfoil for best overall balance of the two surfaces as it will be called on to do some of the lifting work. And most writeups I've seen call for the canard surface airfoil to have a little more strongly cambered an airfoil than the rear wing. Now you can get that by either using a full flying surface, as you're doing, that has a cambered airfoil or you can do it by using a fixed forward surface and flap/elevator. In that case the flap/elevator is acting as a camber altering surface to add or remove camber as needed. The only trouble with a movable control surface instead of an all flying surface is that the hinge line can force the section to stall and lose lift earlier than a high camber value all flying airfoil with a good airfoil.