Grocery-shopping, party-favor-shopping, class-candy-shopping -- I even filled up my car with gas. A productive evening, if not particularly relaxing.
At least I discovered a handy Web site to find snow parks:
California Sno-Parks. These seem more oriented toward snowmobilers than sledders, but there are areas for sledding and kid play. Many of the trails I rode on on the Sierra had signs for snowmobilers -- we might well end up on some of the same ones!
We'll see if we can pull off a one-day trip to sled and snow-play the week before Christmas. Life's stresses make those things all the more necessary.