I know that this is short notice, but the 2019 Black Hills Engineering Show is next weekend, Sept 21st and 22nd, in Rapid City, SD. Due to other obligations I will not be able to attend, but am already laying plans for next year.
http://www.blackhillsmodelengineeringshow.netThey appear to have a problem with their website as I kept getting redirected whenever I clicked anywhere on their page, so I notified their webmaster. In the mean time, you can navigate their page as follows:
Chrome, MS Edge and IE: right click on a link and select 'copy link' then right click in the address bar of your browser select 'paste and go'
Not sure about Firefox, Safari, or Mac.