After thinking about this thread, I have come to the following conclusion.
Put some kind of flap on the canard surface ONLY. It would probably have to be a dual action thingy in order to provide variable flap settings plus the basic elevator function. Maybe a full flying surface plus a conventional elevator surface?
You don't need a flap or such device on the main wing because it is easy to simply drive it to a greater and greater angle of attack. It will not be able to reach a critical stall point because the foreplane will always stall first.
The canard surface is - in normal flight - already operating at about 130 percent of the loading of the main wing. It is also running at least 2-3 degrees greater angle of attack. This is just the way you have to load a canard in order to insure that it stalls earlier and the ship is pitch stable.
The limiting factor on take-off speed and landing speed on a canard aircraft is the ability of the canard/elevator unit to reach enough lift to compensate for its considerable loading. The lift provided from the main wing is not a issue in terms of minimum flight speeds.
In fact I now remember a canard Viggen (?) built by Col. Art Johnson (I think) that put the flap function on the canard surface. I believe it used elevons or something on the main delta wing for pitch control. This would have been in a magazine at least 10 years ago.
Allan