Unleaded race gas near Tri State dragstrip?

[1QUICK85]

I am going down to race my uncle and cousin in Iowa at the tri-state dragstrip. Any know of somewhere to get unleaded race gas at? The only place by me I know of sells 110 leaded. I wanted to just add some unleaded higher octane to be safe as I will be 3 hrs from home.
So, I am looking for unleaded race gas inbetween Madison and the dragstrip, if that is even possible :biggrin:
TIA, Nick.