You will enjoy the ride.
Durmitor is great, very scenic, I was there just before last Christmas. Doing the Tara Gorge and Lake Susicko is good
There are a lot of photos on my RR (link in the signature block), also the routes I took, if you fancy a look. I also put routes and google earth shots. Feel free to leave a comment if you look

There is nothing to be worried about in Northern Montenegro, there is a camp site in Pulzine which I stayed in
I took a really good route from Prozor to Mostar in Bosnia, a mix of gravel and hard roads, through forests and mountains.
Sarajevo was a great city, I stayed for 3 nights in an Airbnb, a ride out to Skakavac Falls is nice
A plus one for what ccaa has said, Kravice waterfalls and Trebinje are worth a visit
I am envious as its a great area
If you do read my RR and have any questions let me know, if i can answer them I will
Wayne