Seeing as how (woman) are wearing less and less (younger and younger), I think Nudist colonies will probably become bigger as time progresses. Not sure about men though, I haven't seen any change really. I'm sure they will follow whatever trend woman set in this regard though, lulz.
I would never do it myself since the the possibility of seeing a real hot female casually buying something at the nudist bar is offset by the 70 year old that having a cough fit right next to her.