Complete list with daystages: Walking from Amsterdam to Sarajevo & EVA's Via Dinarica Green Trail.
For stories about my hike, check out my blog EVAdinarica Project.
It might be fun to raft some parts, especially UNA NP would be fun. Only have to go in the opposite direction than I did ;) .
Note that there are many straydogs in Bosnia and Herzegovina. Especially near Bihać, Una NP and the bigger towns this was not a comfortable situation. I suggest to bring a dazer (NOT a taser!) to keep the dogs away without hurting them.
Stories on my blog
GPS for sure, also as long as there is no official Via Dinarica Green Trail in BiH it could be good to use other navigation apps like MAPS.ME and Wikiloc as well to find the most scenic hiking route.