Check the website of the colony. Overwhelmingly most do not allow it.

I have seen a few however that were adults only, and either didn't say anything that precluded them, or said they were allowed. One site was funny about it.

Q: "What if I see someone with an erect penis?"

A: "Don't look. Or even better, admire it."

Made me want to go there really bad.

would love to see that pic lol

Both my 1st wife of 4 years and 2nd wife of 40 years, and my 2nd wifes sister. have all been nudists since the early 1960s. I can't say that I ever had a hard on in the resort, when I didn't want to have one. Sometimes when we were not in the view of any kids or other folks that we didn't want to "show all to" my wife sometimes stroked me to hardness and let me shoot off under a towel or one time with another couple, my wife jerked him off and his wife gave me a great handjob.
It is not a normal activity in public in most clubs. I have never seen any open intercourse in public.

I will chime in that in the vast majority of cases, no, erections are to be ignored / covered up, and really they don't happen that often. We belong to a nude resort here in PA and hard ons are few and far between. Sometimes someone will catch my eye and I will feel thing growing, so I will go in the pool to cool things off or cover up with a towel. As has been said, most resorts are naturist family friendly, so that is not something that is welcome in the general areas. What happens behind closed doors, in RVs and Tents is something different.

The only nudist camp close to me is men only... I bet there are nothing but hard-ons there!

I've never been to nudist area before but I understand that the popular belief that everyone walks around hard and jacking off all day is completely wrong and that in fact everyone is used to seeing everyone else nude and get to the point of not really paying too much attention. I'd like to visit one someday and experience it for myself. I think being completely naked with lots of other men and women would be cool.

Wife and I belong to nudist camp in the North Carolina's Mts. we have to be careful but it is very difficult not to get a nice hard one