Wow, very impressive patch, and nice pictures of it. We had just such a patch here in Milwaukee until last year -- 100 acres, in fact, covered with milkweed, alive with monarchs -- but it was bulldozed for a giant floodwater detention project. We still get by with the remnants along the edges of it, but it will never be the same. You should check with local zoning officials to see whether your patch is designated as parkland or is in any other way conserved. I hope you never have to go through the pain we did when we learned our great monarch meadow was going under.