He's a muture animal and if he feels pressured he may very likely leave the area. If these coyote hunters haven't gotten close enough to spook him and the buck has kept his distance from the hunter there may be no issues. It's hard to say with so many factors. Have you seen him lately? Are the coyote hunters hunting over bait?

I've always known night hunters who hunt predators to hunt bait and they'll most likely not be walking all around the woods. I wouldn't abandon the spot. If they haven't had a close encounter he'll be around IMO.