Editor’s note • This story is available to Salt Lake Tribune subscribers only. Thank you for supporting local journalism. This winter has been a frustrating one for many Alta skiers, and it wasn’t just because of the meager snowfall earlier this season. On weekends and powder days, the parking lots at the head of Little Cottonwood Canyon often filled up by 10 a.m., forcing hundreds of late-arriving skiers to turn around and go home rather than enjoy a day on slopes that have become more and more popular. Depending on how you define the problem, there are either too many cars in the canyon or not enough parking.