What type of trap are you using? Is is a store variety or one that you have made?
If you are an avid DIY'r I'll assume you have copied the store variety and will offer these helpful hints.
3. Location, location , location. You're on the Lewis river (lucky bastard) so finding a good spot should not be a problem. Most comments I have read here refer to a mud ball type of home and while yes this is true for many areas in crawdadding not so much for here in our region. For this area crawdads will congregate under large boulders around bridge pilings under submerged logs and such but by far their favorite habitat is a clay bank. If you can find near you a clay bank you're golden. This is where you're gonna find em. Even at this time of year you will be able to coax them out of their holes if there is the promise of a free meal in it for them just make sure you secure your trap well or a wayward downed tree will sweep it away.
Enjoy the sun today it's great even tho it's brisk outside