I chartered gulet in Croatia in july of 2019. Me, my wife and 4 kids really enjoyed on our trip across the Adriatic sea. There is a lot of things to see in croatia, medieval cities, best food in entire universe and very kind people.. If you can not decide between Croatia or some other country i hope this post will also help you. We booked gulet for us through tourist agency GuletHoliday.com located in city of split, in the same city we started and finished our 7 day trip. From my expirence i can really reccomend them, they are responding very fast and they are very knowledable about all their boats and ports in Croatia generally. Also Marija - she was in charge for us, is very polite and she is available even in midnight if you need her.
With gulet itself everithing went well, crew was very kind and we really enjojed.
Here is link for web page for Gulet Holiday: https://guletholiday.com/