Have an awesome time mate!
Les gets is the nuts, don't avoid it! There's a bucket load of things to ride, that's not the "main Les Gets run. Jurrasic park, Slayer, Forrest Gump etc are all immense. Just off the main pleney line, near the top, you can bust a left and there's some sicko off piste riding.
Super Morzine is my favourite part of all PDS... well, maybe Morgins too. I'm not referring to the taboggan run type stuff they've built there on SM, but the less than legal tracks are epic.
I've quit biking for the foreseeable future (i.e: can;t see myself getting another), sold up all the things bike related. There's plenty of full DH here and a load of long distance XC riding, but my heart's not really in it anymore, particularly because the mates I had riding with me aren't with me