If I were king for a day, I would build a parking lot the size of a football field at Idaho City. It would be for skiers, snowshoers, snowmobilers, sledders and tubers, or whoever else wants to use it.
Idaho City is already a popular place, but more of a stop over than a destination, especially in a big snow year. Everyone gets shoe horned into a few parking places outside of town. I was up there last weekend, and there were cars jammed into any wide spot from Hilltop to Banner Ridge. There were dozens of cars parked on the shoulder of the highway near Hilltop because they wanted to go sledding.
Idaho City has lots of flat terrain nearby, and it seems like it would be pretty simple to flatten out some of the old mine tailings and make a parking area. It would take some effort to keep it plowed, and if the folks at Idaho City wanted to charge a couple bucks to park there, I wouldn't complain. It would be a lot cheaper than the ridiculous $7.50 minimum it costs for Park N' Ski areas, and closer, too.
You could have a snowmobile trail that leads to nearby roads and groomed trails, and leave some of the snow near the parking area untracked for skiers and snowshoers.
I'm sure there's a slope someplace nearby that would make a fun sledding area.
A big parking area would bring a lot of money to Idaho City. I know I would rather eat lunch at a restaurant than from a brown bag. I would love to take people up there and rent snowshoes and take them for a hike. It seems like a natural. I could see myself using it in summer, too, for motorcycle and mountain bike riding.
Everyone knows there's need for more winter parking, and Idaho City could profit from winter recreation much more than it already is. This isn't a case of build it and they will come, they're already coming, but many are driving right through without stopping and spending.