This is good advice! Les 2 Alpes has the glacier all summer. It's kinda flat, but they have a park up there which is fun, especially in the summer, with nothing else going on. There's quite the nightlife scene there, too.
Get a guide for La Grave. I'd suggest Joe Vallone. He's a member of Copper's freeride team, super good guy and he will show you the goods. His email, if I remember correctly is joevallone@hotmail.com.
There are TONS of other resorts close to you as well. You will be spoiled and probably never come back.
Have fun!