We're framing the sides, front & back with 2"x4" welded wire. On the lower part of that we're going to put up some sort of finer mesh fencing (not sure exactly what yet) to keep the little ones from sticking their heads or wings through the 2x4. The top will have a tarp covering either end with a sun screen fabric in the middle.
They'll have their "quack shack" built inside of this large 14'x30' headquarters so we can lock them up at night and for them to lay in (eventually/hopefully). The solar auto-door will be built into the shack so they can exit that into their headquarters. That's where we'll have their food and water and pool. Then once we get things going in the morning, we can open the headquarters up for the day for them to roam the garden and fenced yard.
Those are the plans anyway. Kind of hard to picture I suppose so I'll try to take pictures as we go along.