This is a good problem to have- red wigglers are finding their way from my compost pile into my Envirocycle! It's interesting how I still can't get the dampness fixed, even after quadrupling my leaf additions each week. I think it's time to make the holes on the sides bigger to let more air in. If you have an old Envirocycle composter model that's pre-vents, definitely think about making some of your own.
Although winter is far from over, it hasn't been consistently below freezing for at least a few weeks...today was 60 F. I remember going outside to empty my food scraps in the bin when it was well below freezing thinking that all the worms must have perished by now. Fast forward to today, and I found one climbing out of the side. They must have burrowed deep to wait it out... glad they're back! It definitely helps speed up smaller scale composting efforts by throwing in some red wigglers.
I haven't been paying much attention to the large compost pile lately, but it made it through the first snow with no problems- the snow wouldn't melt on the center- good sign! While emptying a week's worth of food scraps into the center, I couldn't help but notice all the red wigglers present... if I can keep them warm, I'll be doing just fine through the winter!