Thanks to Chowhounds for suggesting a stop at Lisa's Central Market. Truth be told, much of the organic produce we bought was mediocre or in one case (white corn on the cob) moldy. But the watermelon and cherries were wonderful.
Best of all, though, were the superb yellow corn tortilla chips that are sold under Lisa's name (presumably these are produced for but not created by Lisa's -- anyone know who makes them?).
We didn't go to Tahoe or Truckee for the food. We had a mostly good but somewhat hit and miss dinner at Moody's, but what I'll remember best were these chips from Lisa's.