Hi Werner,
We Flyertalker's (specifically the mileage runners like myself) have been helping FareCompare refine their software and I've been using their tool since before the AZ YYZ-LCA fare issue. It's a great tool, but can often be misleading.
I looked at the airports within reasonable range to PIT and also to/from SMF for the date ranges and compared to RNO. I didn't see anything that would justify the drive on either end, by the criteria I use for mileage running. I don't like posting too much information, since I feel that would be an abuse of my subscription. Given the market parameters (fuel costs up and LCC hedges ending) and time of year (I'm assuming the holiday in February), along with the popularity of the destination at that time of year, my instincts are that prior recent years will not be indicative of future results. Of course, the flexibility of the flyer matters and remains to be seen here. I'm very flexible and that's how I get the deals I do.
Best of luck!
Pat