This is what Travel Weekly reports and who are we to disagree!
Croatia joins the EU as its 28th member in July and the article encourages those that are inclined to visit Croatia not to wait too long before the hoards realise what they have been missing.
However, unspoilt Vis is not expected to change much. It has no facilities for coping with mass tourism, and instead enjoys offering a warm welcome to those who appreciate good food and wine, the clearest water (with excellent diving), in beautiful surroundings and no-one to disturb the tranquillity of your holiday relaxation.