I am nude at non nude beaches, I just set up so I can cover up if I have to, but mostly I don't. I will get in the water nude. I just walk in and look forward like it is legal. I have had comments from people but they were always supportive. Sometimes people will wait until I come out of the water and tell me it's okay. I have even had people join me that's soooo fun. My beach is very spread out and never more than maybe 100 people, it is not uncommon to see someone nude in this community. New people to the area get shocked.
I have, but we are in Canaveral national seashore park and there is designated nude area, I was seen by the rangers doing turtle patrol in a non nude area. The girls smiled stopped and talked, they did a lot of looking and then they left. Friends I know tell me if they like it they say cover up . The national parks have no law against nudity, but there may be local ordinances about it.