You would absolutely need to find a teacher/staff member to "sponsor" it. When you do this, the process becomes a lot simpler. You may want to consider calling/visiting you local hills to get prices for the various packages they offer clubs. Have no fear, there is usually a dedicated office or person for group sales at your mountain(s). How is your club going to travel from school and back? will you calling a local bus company or can you find a way for the district to swing it? If you have any questions, i can probably help you out. My parents have been running school ski clubs since the 80's.
Find your beam and follow it.
Well Richard, when all is said and done; it makes good toast.