bub, I have to agree with you on the shades. I bought some last year that look like the ones my grandfather wears, but d@mn they work good. The only thing I can add is BRING WATER. As the old saying goes, "If you're thirst, you're already dehydrated." We always have a big water jug in the truck and just use it to fill our water bottles. Trust me, the headache the next morning from being dehydrated all day will make you wish you had a hangover.
My only experience with any other protection from the sun is to be comfortable and bring some good sun block. A good friend of mine was covered head to toe last year. Long sleeves, long pants, and a wide brimmed hat. He looked a bit like Daktari, but he didn't get burned. Myself, on the other hand, wore shorts, white t-shirts, and a ball cap. Plenty of sun block and I was good to go.
Did I mention, bringing plenty of water...