If the parents don’t make a fuss out of it, then children will see it as a mild curiosity and ignore it after they get bored and move on to the next thing. There is sensible debate and guidance within the naturist community about this.
The same as when we go on group walks. These are generally well planned to avoid the busiest areas, landowner’s permission sought if needed. Also very large walks, we inform the local authority and police in advance.
Even so occasionally we will meet others unintentionally. Most parents pass with their children and give a gentle hello etc.
Then there’s the outraged ‘alpha male’ who goes ballistic even if you’ve covered up with a wrap etc. Probably because he wants to be in the pub watching football anyway, rather than with his family. (you can spot the type at 200 yards) Enraged on behalf of the whole world and making sure you know it.
Which of those family’s children will be more likely to grow up into well balanced adults ?