Island Unije in Kvarner has three nice bays to stay the night with a boat. Maračol used to belong to the Yugoslav army and was closed to general public for a long time.
Now there is an anchorage there with 50 buoys to tie your boat to. Off course they are full during summer and you have to be very early if you want one. The price is 13 hrk/m.
If you’re too late, there are still Podkujni and Vognišca but no buoys. Island Unije is the last island before crossing the Kvarner which can be pretty rough in bad weather. It’s very open and the winds are strong, especially NE wind Bora.