Working with wildlife is about pushing yourself to get out more often and photograph them in their natural element no matter how uncomfortable it might be for you. Keep in mind that those critters are out there just like you are and they don’t have a warm fire to go back to afterwards.
One of my favorite places to go in the Winter is Yellowstone. I know i talk about the park a lot but hey it yields a lot of different possibilities. With the cold temperatures comes great fog coming off of the rivers and geothermals. What that creates is a background that is not only clean but also more interesting.