They'll use cedars to bed in until they get a bit mature with the lower limbs dying. I'd say a big mistake is assuming deer bed in a certain spot/area. Even with a sanctuary, I think it pays off to confirm in the offseason. If a good buck beds there, leave it alone or make small improvements. If they don't, at least you've confirmed and can make plans accordingly. They'll tolerate a bit of pressure, particularly in the offseason. I planted and protected a couple hundred trees and shrubs the past few years. I've also done a bit of edge feathering and cutting to make doe bedding areas. This year I've begun cutting to improve some tree stand locations.