Hi there,
good choice - especially Slovenia.
You can start with viewing a short clip about Slovenia: http://www.youtube.com/watch?v=czPSeShIVGQ
A great resource for active holiday in Slovenia: http://www.slovenia.info/en/Active-Holidays.htm?aktivne_pocitnice=0&lng=2
This is from Lonely Planet:
Every town in Slovenia has a general store where, locals like to say, you can buy anything od šivanke do lokomoti (literally ‘from a needle to a train engine’). Similarly, Slovenija (Slovenia) itself, though undeniably small, has a wealth of attractions to rival a country many times its size. Resting between the Alps and the Adriatic and poised above – but not a part of – the Balkan peninsula, Slovenia has been blessed with incredible natural beauty and has welded a great number of outside influences - from Roman and Venetian to Germanic and Hungarian - onto its Slavic core. The result is a physical and cultural alloy that is wholly distinctive and distinctly precious.
Slovenia has been dubbed many things – ‘Europe in Miniature’, ‘The Sunny Side of the Alps’, ‘The Green Piece of Europe’ – and they’re all true. The place abounds in top-notch things to see – the stunning Julian Alps, the beautiful but busy Lake Bled and the more relaxed Lake Bohinj, the karst caves of Postojna and its lovely sliver of the Adriatic around Piran. Then throw in historic towns like Ptuj and cities like Ljubjana, both with unforgettable architecture, museums and a unique energy all of their own.
In the land of the great outdoors the list of activities on offer here is almost endless. Throughout the year you’ll encounter locals engaged in decidedly active pursuits – canoeing and kayaking in spring, swimming and water-skiing in summer, hiking and climbing in autumn, and skiing and snowboarding in winter.
And then there’s what I consider to be Slovenia’s greatest single attribute: the Slovenes themselves. The typical personality is quietly conservative but deeply self-confident, broadminded, tolerant and very friendly and hospitable.
Don’t misunderstand me, Slovenia ain’t paradise. Like everywhere, it has its own share of difficulties. But when I die, and whoever is in charge decides I’m heading north and not south, I’ll take along a copy of the Avtoatlas Slovenija (Road Atlas of Slovenia). You never know – it might prove useful.
best