I spend most of my weekends at Mammoth, so it is Ikon for me. If I lived up north and spent my weekends in Tahoe it would still be Ikon, as I love Squaw. Having said that, my buddies up there have said Squaw is much more crowded than in my ski bum years, some want the return of 1600 dollar passes.
I have to get a ski lease in Mammoth, which costs around 500 a month with utilities. Because of that expense, I rarely travel, I only ski Mammoth because trips anywhere else are not in the budget. I occasionally go up to Tahoe, where I can stay for free, but I don't plan many other trips. I went to Gordy Pfeiffer's camp in Utah about 6 years ago, a truly great experience, but that is all the traveling I have done outside of California in the last decade. But with the Ikon pass I might try to travel if I can stay somewhere cheap. If I am going to travel, I would go to Big Sky, Jackson, Revelstoke or Snowbird/Alta. Those places are all on Ikon, so I might try to take advantage of that. The Ikon is pretty awesome for California skiers.