I really like the sanctuary concept. I two areas totaling 11 acres that I did on my farm. Can not say enough how important it is that they have a “safety area”. When I cut any trees in those areas, I create more bedding areas with the tree tops. I like piles that are up to about 8′ high, 10 or so feet wide and 20 feet long. I have these scattered out in my sanctuary areas and they love bedding amongst those tops. Especially when they been pushed a few times.
As for food sources, I would add a couple good sugar/carbohydrates for the early freeze time of the fall. I’m sure Bob will toss in some great info. They pound that in my plots just after the first hard freeze