We didn't stay longer but did both Reno and Tahoe on our junket. Spent a day in Reno, then Tahoe 3 days and final night in Reno, worked out great. Hertz has a rental desk in Reno lobby to make renting a car easy.
We rent a car in Reno, we like to explore area. But they let you split your junket up between Reno/Tahoe...that is cool.