Interface-Omaha is coming back to Omaha this fall. The INTERFACE-Omaha conference is taking place on at the CHI Health Center.

This isn't a security only event but a general tech event.  That being said they usually have some good security topics as well.

From Bernard at F2FEevents (sponsors of Interface-Omaha)

"Our plan right now is to host the conference in-person at the CHI Health Center. There is no cost to attend, and they can earn up to 6 CPE credits during the day. We will have plenty of door prizes to give out, including Amazon Gift Cards as well as $500."

Here is the Event Link: https://f2fevents.com/event/neb21/