That reminds me of a guided trip the wife and I did a few years ago with South Fork Outfitters. The guide we fished with had blonde hair and very light colored skin and you could see dark patches on his face, looked like pre-stage skin cancer, but he was only wearing a baseball styly cap.
How about something like this:
Boating Hat: Sun Protective Clothing - Coolibar
The rage these days is to wear a baseball cap and a buff.