I wouldn't label us as regulars, but we have gone 5 to 6 times a year for the last two years. We always go as a couple. She's never expressed a desire to go alone, but I guess I wouldn't say no if she she really wanted to. We've taken a couple of friends, at different times with us, and another that I got dragged along for as a reluctant chaperone.
The cold hard truth is that an attractive single woman at the nude beach is going to attract some weirdos.
So yes, as a couple or group.
Does my wife (she was my girlfriend last year) look at cocks? Yes, but not in a thirsty way. She gets looked at, and she looks. I was talking to a friend the other day, and this actually sort of came up. We aren't nudists, we enjoy the low-key sexuality of being naked and being seen by others. We like seeing others with the same mindset, too. So looking and being seen without being rude or awkward is why we go.
We've only seen one massive guy (like porn star big), and her reaction was, "Holy Shit"