Hey mothership, I was at BUSC last year in Les Arcs 1800. It was completely by accident but we were there at the time and BUSC rocked in for the last two weeks in March, bringing a great atmosphere! The resort laid on loads of open-air parties and the nightlife was buzzing, it did feel a bit too much like a campus for the two weeks tho!
Went to the big air ski comp too which in terms of standard of jibbing was lame but a great party - bar, sun terrace, bbq and DJ, along with hundereds of students. Try it, you might like it!