I hate to say it because Alta is maybe my favorite place on earth, but I just avoid them now. We moved up to Summit Park area (just over the pass, in Park City school district) and ski Canyons, plus a lot of backcountry in the Wasatch back. The cottonwoods are getting loved to death and I don't see a great solution -- widening the LCC road and adding a dedicated bus lane would work, but it's a narrow canyon and I'm not sure it's even possible.