Champex-Lac is now overrun with guys with fat skis and no avalanche awareness. Having a beeper and backpack does not mean you have avalanche awareness. Be careful if going off-piste. Champex-Lac is not a very big place and most of the 'get outs' require you to point it and not dilly dally around, unfortunately lots of newbie's trash the place before lunch. Unless your an honest expert who knows the routes at Champex-Lac I'd suggest stay back in Verbier. There are some easy runs but do not drop in unless you know the proper safe way through - following tracks could be suicidal but I see it all the time.