Where to find Zopherus nodulosus haldemani?

[arizonablue]

I'll be driving through Texas this summer, and I would love to track down some of these beetles. From everything I can find online, they're mostly found around the Austin area, with College Station mentioned as a good location. Oak and pecan trees are mentioned as prime habitat.

Anybody here from the area who could give me some tips on where to find them? My plan is to just poke around some wooded areas and hope for the best, but any tips on the best places to look would be much appreciated. Thanks!