Random but need answers!! :))

So I have a band banquet in May. (Has anyone been to one?) I have no clue on what type of fancy, but casual kind if dress to get. Any ideas of what kind of dresses I should get? We will be getting rewards and walking up on stage. I don't want to be overly fancy. Thank you! :) (this will be my first one so I'm kind of worried and nervous and probably over thinking it)