Wind River casinos keep growing WYOMING (wpr) - It has been almost three and a half years since Las Vegas style gambling first started on the Wind River Reservation. In that short amount of time, four casinos have opened and employment has grown from about sixty people to over 600. Wyoming Public Radio's Renny MacKay reports that so far the positives of the casinos far outweigh the negatives. © Copyright 2009, wpr