I returned from the tour! It was hot, hot, hot! It wasn’t bad if I knew I could sleep in a/c comfort at the end of the day and of course the bus is a/c. Two of the hotels didn’t have a/c. The worst was the hotel at Plitvice National Park. I felt as if I were in an oven when I arrived. I did open the window at night and that helped. Just some mayflies came in, no mosquitos.
It was a wonderful trip and I highly recommend it. Bosnia and the island of Korčula were highlights for me. Bosnia was so very different from Slovenia and Croatia and Korčula was a great just to have the “day off”. Both places are beautiful.
BTW You can take your laundry to places in both Split and Korčula. I recommend Split, because that is halfway through the tour. Plus the laundry place was easier to find in Split, IMHO.
You will be lucky if you get Sanel as your guide. He is Bosnian and a nice guy. Very friendly and extremely helpful.