well, if you want to ski in the weekends, working at a skishop is probably not such a good idea...
i've worked in one for 2 years now and weekends and holidays are by far the busiest days ....
i still managed to get in a lot of days because i worked as interim and pretty much picked my own hours and helped them out when they needed an extra hand, this was imho the most ideal schedule i could ask for :)
but for you since your still at school, you can't really be so flexible with your hours ... so just realize that nobody is going to pay you to ski... so you either get out of there and get skiing or work your ass off and make money ....
/hard reality