It's got four peaks streaked with expert runs bearing names like "Avalanche," "Hari-Kari Gully," and "Shin-Splinter Spin Cycle."OK, so I made that last one up. But the point is, Sugar Bowl Ski Resort has built a reputation in the Sierra as a playground for the powder gods, the skiers who say things like, "I only wore both skis on that last run because the lift guy made me."But what about the rest of us? While our more-advanced friends head off for the double-diamond runs in the Sugar Bowl stratosphere, can we of limited balance still get our money's worth out …