Thanks Turn Key! I'll check out that review. I ALWAYS read your reviews before deciding where to go!
What they said about the pollutents is that all the rain had washed the bad stuff from farms and ranches upstream into Onion Creek. Dunno...could it be a problem at other rivers around? Hadn't heard this warning about any of our other lovely rivers, but did read about this possibility specifically with this park.
Hope you and DW are feeling better and can head out soon!