If I'm going up for 2 or 3 days of skiing, I'll bring 4 to 6 pairs of skis, depending on conditions, and if I want to work on any of them at the ski house. I never go anywhere without powder skis, because you never know when the weather will change. You also don't know when you're going to break a ski, blow a sidewall, break a binding, etc and be too drunk to fix it that night, so it's handy to have a backup pair that is close. But it's a pain when you have 4 pairs of skis that need tuning or repair. I've cracked couple sidewalls the last couple weekends, and it's been nice to have backups. I think almost every ski needs some work right now, I'll probably bang it out tomorrow:
Head im88: fix cracked sidewall, sharpen and wax.
Stockli asteroid: fix cracked sidewall, sharpen and wax.
Powder plus: pretty much ok, deburr, possible move bindings from -2 to -1 (on driver plates).
Bigs: rebevel from 0/0 (yikes!!) to 1/1. possibly shift bindings from -1 to 0 (plates)
Assaults: Mount. (just got skis)
If I had to ski tomorrow without doing any work, I would only ski on the M:ex or P+, a groomer ski and a pow ski. If you ski alot of soft snow and sketchy cover, it's nice to have good pow ski (pow plus), and a good rock ski (bigs), on top of your all around skis (88's).