1

"are they any good"

Good for what?

Cres is probably the most beautiful island in the North Adriatic. It possesses rugged beauty, has some nice bays reachable by boat only and is quite isolated.

Lošinj is picturesque, lively (if you are coming in summer) and has some nice beaches.

Rab offers the most in terms of culture. The town or Rab is really pretty.

Dugi Otok has the most beautiful nature, from sandy beach, cliffs to salt lake.

Pag offers a bit of everything.

Don't forget Kornati islands NP!

Nice food? Head to Istria peninsula.

2

Thank you!

What would be the distance between cres and kornati np? Is that easy to travel in 2 weeks?

3

sas: you can sail from Cres to Kornati easily in a two week period, making stops along the way, as you wish. You should have a good navigation chart detailing safe bays to anchor the boat and spend the night or weather the occasional storm. In general, along the coast there is a chain of islands, you can practically swim in between let alone sail, there is always a mainland or another island in sight. That should not fool you however, the tempests can be sudden and strong, though short, and it is good to know where a safe harbour is (and there are many of those, given how well indented the coastline is).
As per 'nice' food: in the summer period, many islands (notably Kornati) offer excellent fresh sea food dishes. You will notice those by the way of the sailing boats anchored in front.

4

Thank you, the problem is we do not have a sailing boat but a 6 meter console boot so not suitable I think to go that far. I guess it will be better to choose one island and then do day trips. Which island would you recommend?

5

Frankly, in your case, I don't see what difference it makes. I suppose you would be towing the 6 footer behind your car? For all it matters, you could be somewhere on the mainland and make daytrips to the neighbouring islands. In that case consider Biograd on the mainland or surrounds as your basis all within easy access to Kornati archipelago. Ditto town of Sali on southermost tip of Dugi otok. In general, Zadar archipelago offers a string of small islands perfect for exploring on daily excursions. Similarly, you could travel day by day from Cres to Kornati staying overnight on a different island making your way south for a week, another week for your trip back.

6

My suggestion is to stay maybe two days in Split to explore it, and than 4 days on island Brac, 4 days on Hvar, 4 days Korcula Island and then one week in Dubrovnik. From there you can do day trips to Mostar, Medjugorje, Montenegro...
Plitvice lake is also worth to see, and if you go there I recommend you to visit small town skradin and national park Krka - waterfalls of the Krka River.

7

I couldnt agree more with kkzd05 , cres is really beautiful :) there r many hidden beaches reachable only with boat. and from cres u can just continue down south to kornati . and thats true hvar is really to far :/