I think your guide friend is right. I booked a well known Texoma Stiper guide who told me they were on fire! Plenty of nice stripers being caught. We went to a point and sat there for a few hours catching nothing but sand bass. I asked why aren't we striper fishing? He said they are usually mixed in with the sand bass. I just went with it, paid my money, took my fillets and left. Not what I had in mind for $450.
Sorry 'bout that. I got into whites good once this years under some birds, and they're 100x better than catching nothing, but can't compete with gettin on stripers.