raj: There are quite a few "clothing optional" beaches here in Calfornia and I frequent a lot whenever I can. I've even visited and camped on nude beaches in Europe. If you haven't figured out, I prefer to go to nude beaches than any other.
The fear of springing a boner is usually over on the first trip. It's not as easy as one may think, unless you are going there to purposely show off the boner. It is usually frowned upon to exhibit anything sexual on public or crowded beaches. It keeps women and even couples away. Perverts of any type are not welcomed. Same for gawkers.
On more private or secluded beaches, anything is possible as long as you are descrete about it. Heck, I've even jerked-off on occasion, not to show off, but to experience nature, the sun, the wind and my hard cock out in the open.
You must do you research. Some beaches are more str8, others are more gay. American nude beaches seem to have more gawkers and perverts as we are a prudish country and not experienced with public nudity as the Europeans are.
Also, being bigger than normal, you also have to get use to people looking at you. If you are not, then this is not for you!