http://www.skyandtelescope.com/astro...s-observatory/

Yerkes contacted the astronomy club I am in and came to Arlington Hts at our March 30th meeting, making a plea for help. The Starlight Festival will be held on Memorial Day weekend and STEM research will be present along with many local clubs as several thousand are expected that weekend.

It could be your last chance and there is a waiting list to rent time by the group between now and October. A lot more could be said here but I will cut it off there unless some here press me for more details.