You might try wearing a kilt - I'm not kidding. I bought mine last summer from sportkilts.com, and it is terrific. No chafing and plenty of freedom of motion; better than shorts. You can go naked under the kilt (traditional) or wear light weight underwear. There are several companies that make them for hikers. However, it does get a wee bit chilly sometimes; definitely not the best winter wear...unless you wear long woolen socks.
