THE RESORTS: Tamarack Lodge and Resort, Juniper Springs Resort, Mammoth Mountain Inn, and The Village Lodge are all in the mix. You need to reserve in advance -- 800-MAMMOTH is where you start -- and you'll need to show proof of your Feb. 29 birthday, of course, when you arrive. That's a good deal, right? How many scoops of ice cream does one resort room for one night equal? Seventy? Eighty? Yep, non-Feb-29ers are feeling pretty jealous.