The return of Ferenc Szony to the Reno gaming market marks yet another shift away from large corporate ownership of northern Nevada gaming properties.It's a trend that's likely to continue.Szony, a longtime Reno gaming executive, heads newly formed Truckee River Gaming, which bid $19.2 million to purchase the Sands Regency, Gold Ranch Casino and Terrible's Casino in Dayton from Las Vegas-based Affinity Gaming. Affinity will entertain other, higher bids until Oct. 1, but if the offer goes through Szony expects to be back in northern Nevada by the end of the first quarter of 2013."Reno is home, and it always …