WHAT TO DO: Take a hike to Komarca Crag, an impressive canyon, and to Savica Waterfall: both are west of Lake Bohinj. You'll want access to a car, so rent one in Ljubljana: Avis, Hertz, Europcar, among others, are around, so compare prices. We were lucky because the farm owners with whom we stayed loaned us their car, though we had to take their twelve-year old daughter who caked on blue eye shadow and terrorized us all bloomin' day. Hopefully you'll befriend a local like we did. Anja, a bright 18-year-old, was our de facto tour guide. One of our best memories was spending an evening at her family's place (they were cousins of the farmstay owners and the two families didn't like each other), eating salted fish and drinking Mozart liqueur. Drop by and take a look around the various villages like Begunje, which are immaculate.
WHAT NOT TO DO: I honestly can't think of anything negative about our stay in Slovenia. I wouldn't drive like a maniac, however, because the roads are windy and narrow, and plenty of other drivers are nuts! Be careful!
WHERE TO EAT: Make sure your farmstay includes meals; breakfast and dinner are usually included. You won't find a lot of restaurants in this region, and many are expensive. In the villages you'll find mom and pop stores, of course. Hopefully you will have some good Slovene country food. We were disappointed because we had German food a couple times, probably because there was a German family staying at the farm as well, and who like other German tourists, can't live without their daily dosage of giant slabs of deep fried meat.
WHERE TO STAY:
You'll have to book your farmstay in Ljubljana. The Tourist Information Center will recommend a good reputable agency. Expect to pay about fifty dollars a night for two people. Some will think this is expensive for Eastern Europe, but we had a great time and it was worth the splurge. Our place was very comfortable and clean.