The two live yew trees I cut where on a private island in the Gulf Islands (between Vancouver Island and the mainland). Of course, I had the land owner's permission.
We also did some digging, and it's possible to harvest cut yew trees from clear cut areas. The loggers just cut the yew and leave it. It's in the way, and it has no market value. They want the Douglas fir, cedar, and Sitka spruce, etc.
If you spend time talking to the truckers, they can sometimes help you out. Occasionally, if the truckers see an exception yew tree, they'll load it and drop it off at some of the saw mills. We saw a 1,000 year old yew log at one of the lumber yards in Sidney, BC. A trucker had dropped it off, and it was on display in the office of the yard. They cut a round off the bottom of the log and sent it to UBC. It was 40" across, so there was 20" of growth. There were 50 rpi, so you do the math. I have a picture of me standing beside the log (it's vertically displayed in the office). It's on my iPhone, so I'm not sure I can post it here. I can try. For a thousand year old tree, it's not very big.