Unless theres something else in Reno that attracts you I'd continue to order online, a trip to the store isn't worth your limited time...
Tahoe is awesome, Reno.. Not so much... As mentioned Monterey, Big Sur, maybe even take the drive down Hwy 1 to Hearst Castle, spend the night in Cambria, Moonstone Landing is a nice place.....
If you'd scheduled around a Mopar happening Spring Fling would have been a great choice but it'll be mid-late April... The former Mopars at the Strip, now Muscle cars at the strip is close to that time frame too....
Depending on the timing of your visit a stop in Famosa/Bakersfield for "The March Meet" is March 2nd through the 5th...
http://www.famosoraceway.com/march-meet.htm