I'm curious if anyone does winter biking with kids in a trailer? I have a two year old -- he loves the trailer in warm weather and I'd like to keep riding as much as we can through the winter.

Any tips on keeping the little guy warm? Bike trail vs road?

I ride an older Schwinn hybrid that is basically a commuter bike. I'd like to do our normal mommy commuting (short rides to library, classes) plus some longer (comparatively) rides for exercise.

We are in the Chicago area, so winter temps and snow vary widely.

Thanks!