there are tonnes of hotels at the base of the hill to stay in, it all depends on your budget.
If money is not an issue, Quintessence Sommet des Neiges and the Fairmont are probably the nicest ones.
Since you are on here and probably younger, you can usually get some deals at the tour des voyageurs. Just look online you'll find some good ones.
As for things to do other than skiing. Check out the caribou. By far the best bar in town. Awesome apres-ski deals on booze too.
Also, they just built a new casino, so go win lots of money, go to the caribou and then the facon bleu depending on how ur nights going.