I can't imagine a situation in a naturist environment where a man would become aroused.
When nudity is as standard and ordinary as it must be, spontaneous erections are probably virtually impossible - it's more likely to be full of mature men who can control their emotions, rather than hormone-driven teenagers.
Since I have no desire to spend any time at all with visions of the last turkey in Tesco’s, it’s not something I would experience personally.
I find the concept slightly weird and self-aggrandising, so it’s not for me.