Producing "at scale"... If they are your leaves on your property, and you can have multiple piles, that would save you a lot of time hauling to one site (unless it were centrally located, but these sorts of things seem relegated to the margins) and then hauling again to redistribute it.
If you want "more", then you might consider "other people's leaves"... whether bagged by other homeowners for removal, or from landscapers. The bags you could collect before the curbside collection happens (you'd likely need a truck), the landscapers could deliver and dump their leaves.
While the leaves are easier to handle when dry, they
compost better when wet. So turning a pile on a rainy day is a win-win. Your wire
fence pen is a nice way to keep it contained, which will keep it neat and hold in some moisture, especially if you fill it higher at the edges to collect any rain/snow that falls on it.
For turning a pile in a pen, I prefer no posts, and to just hook the ends of the
fence together (just hooks, not twisted) so that I can just unhook the loop and peel it away and set up next to the old pile. I even wait until I've begun the new pile, with all the outer "crust" of dry leaves, so I don't have to lift over the fence. (Which I'm sure is why you left the opening between posts.)
At a larger scale, you could have SO MANY LEAVES, that you'll want a
tractor, and NO pen, and won't miss a few blowing away... A mesh tarp can help with blowing, but so does turning over, wet broken down leaves don't blow as readily as whole dry ones.