Steve, although it might not be Your particular "cup of tea", and depending on where you actually set foot in the U.S. you might check The websites for The AMA, World of Outlaw (Sprint Cars), Sports Car, Stock Car (Nascar) or Drag Racing for Races in the Area.
The Goodguy's Sreet Rod event in Pleasanton, California (East of San Fransisco) occurs about the same time, and depending on where you are you can jump on Bus Tours of National Parks such as Yellowstone which is a couple of hundred miles north of SLC or Rent a couple of Van's and head South to The Moab area (Where Sum(ner) Patterson one of our Bville competitors has been known to rescue folks in need (No Soccer Hooligans though).
Keep in mind that as long as you respect the fact that We kicked your Acura in 1776 and also that its not thought of as polite to spit out Cold Beer over on this side of the Atlantic, Where ever you go, ask the first Biker who doesn't have a Crescent Wrench chained to his Nose, or any Hot Rodder what's Happening in the area.
Do not plan on Staying in Wendover for more than two days max. Other than the Enola Gay Museum, There ain't much else to do and the slot machines favor the house.
Bob (Hey, I'll bet Stainless would love for the whole group to stay at His House if your in Kansas)