The camps in Romania are run by Hungarians and teach the Hungarian folk music from Transylvania (you'll find Romanian and Gypsy music mixed in, but I've only met one gypsy participant and no Romanian participants at the camps. The teachers may be Romanian/Gypsy, though). The teaching in the advanced classes is by the village bands, and the beginning or intermediate classes are taught by professional players who tend to have a broader repertoire, and go from camp to camp to teach and play at the tanchaz at night.

In the United States, there are two summer camps (Ti Ti Tabor and Csipke) that aren't listed on the folkradio page. You can pull up their websites with a quick google search. There are a few people with extensive experience in the US and Canada who can teach this music, but you'd have to ask around to find them - start with your local Hungarian society. Being from the US, I don't know much about the Australian and UK scenes. I know one player from the UK and a few from Germany.