I don't think any of those options are really gonna provide much protection from anything beyond sun and some twigs/bugs. I wear a sandana to help keep the sun off the back of my neck.
Hundredth Monkey makes a head/neck wrap that appears to provide actual impact protection. Called the mullet IIRC.
"Originally posted by EastCoastAngel: He came up under gen bolder....I thought it was a ****ty chick....turns out I was half right....he status updates like a drunk whore"