The whole reason for my 'Caroline and Friends' series of videos was to get these last few badges from Island Paradise. Now she's got them all she's got her friends and they are working on University Life badges.
I read and proved to my own satisfaction that you have to have a single sim household to get the badge for discovering the hidden islands.
I found the houseboat parties easy to get after I moved Caroline onto the houseboat to live temporarily.
The resort badges apparently don't trigger if the household owns more than one resort. I also had a single sim household to do it.
