So, apparently you are a follower?? I say that because you seem to be too concerned with what other people are doing or like. I never knew that there was "shaving etiquette" at nude beaches and nudist resorts. It's always been "come as you are" at these places. I'm sure you will see shaved, trimmed and hairy people once you get there. It should be, and generally is up to you and your wife as to whether or not you want to be bald or hairy!!
Is there any other families that go smooth together. We do and i had some stares at the resort we went to. Kind regards