In the end, we went with the simpler permit. I finally picked it up last week and taped it to the front window. It's official, our project is official.
Our expediter recommended only taping a copy to the window and keeping the original elsewhere. Not sure why, but i did what she said anyway. So here is my ultra secret hiding place where i have the original - that i am revealing to the internet.
I still had my shades on, but this time it was not quite as cold - and i had to drive to west town to pick it up, rather than metra to the loop.
I also could not resist checking out my fave thrift stores in the area and found this fun chair to add to my new shop inventory. So it was win-win-win.