Hello Lucy.
Here is Mladen from Pula, Istria region in Croatia. I can recommend Istria as the best location for your project. In a relatively small area there are all the elements that you need. Istria is well connected with roads, with the international airport in Pula and several smaller ones in the vicinity.
I’m in film pre-production and location service, and film and video production. My official website is under construction, so I send you a few links to pages of the Istrian destinations and a few pictures.
http://www.istra.hr/en/home
http://www.natura-histrica.hr/ENGLISH/galerija_en.html
http://www.istra.hr/en/regions_and_towns/town_and_cities/ltz_motovun
http://www.pulainfo.hr/en/
http://en.wikipedia.org/wiki/Pula
http://histrica.com/istria/
https://www.facebook.com/Histrica.Istra
In Istria was filmed many movies. I will mention some of them:
Kelly’s Heroes (1970) – http://www.imdb.com/title/tt0065938/
Red Tails (2012) – http://www.imdb.com/title/tt0485985/
Armour of God (1986) – http://www.imdb.com/title/tt0091431/
La Femme Musketeer (2004) – http://www.imdb.com/title/tt0341855/
Titus (1999) – http://www.imdb.com/title/tt0120866/
I hope that these few details will boost your interest in Istria. In case of any query, Feel free to contact me on my private email; mmedic7@gmail.com
In anticipation of your possible answers,
Kind regards,
Mladen