rickyp, I have not used the Cabellas windstoper fleece, so I am unable to answer your question directly. However we do use a lot of fleece here in southeast alaska. All fleece dose not seem to be created equal, so as far as warmth you probably will need to experiment.
Due to our wet weather I usually use fleece as a layering garment, under a wind and rain proof outer layer, so I don't buy the windstopper version. In your application I believe your thinking is sound. And with cabellas returns are painless if it does not live up to your expectations.
Regards, Byron