We did a full day boat tour out of split. This was an easy way to see a bunch of the surrounding islands, stopping at BiĊĦevo, Vis, and Hvar. While the islands are beautiful, and the Blue cave of Bisevo was one of the most unique caves I have ever seen, SKIP THIS TOUR. We ended up spending most of the morning waiting to get into the Blue cave, and the rest of the day basically bouncing around islands not accomplishing much.
Hvar Town had a beautiful little stretch and we enjoyed sitting at a beach here. We also stopped at Carpe Diem Beach, which would have been a fantastic (but maybe a little sceney) place to party.
Bottom line: Dont try to do everything and skip this tour. Instead - pick a day trip to a beach such as the Golden Horn and call it a day!