Speaking for and about my wife, I can say that she has gotten way past being embarrassed on showing off any Vacation pics that she either went Topless on or even Nude!
Plenty of times we have other friends or family members with Us on the vacations, because its always more FUN and exciting to be with friends and having somebody to share the thrills too!
You'll be able to see or notice that most of the people you'll see or even meet at those types of places where its permitted, have some type of phone or camera and their all taking pics!
When your in that type of setting where all or most of the people that are Topless or Nude, it makes it easier for having the wife and friends doing the same!
When you do get home and everybody knows you been on vacation, they all are asking to see the pics you taken so hiding them isn't a great Idea and if those asking know more about you they'll expect to see some Exposure in those wonderful pictures!
Having a special vacation bathing suit that reveals plenty also makes for plenty of talking with others on vacation and at home!
I'm not sure about many of the others we got to meet and talk with while on vacations, but we had plenty asking Us to take many pics of them while being exposed or having others join them in the group shots!
So all I can say is that I believe its all in the open mind of the women and just what they plan on showing on vacation and if they'll let anybody else see what they done away from home!