Skiing ... cheap? Impossible, you say? Well, not if you know how to frugalize your ski vacation. There are many skiers who don't pay a penny more than necessary to support their skiing habit."My son and I like to go to Tahoe skiing, but we're not made of money, so we have to stretch the dollars," says Andrew Urbaczewski, an avid skier and professor at the University of Michigan-Dearborn.