We do dozier and excavator work all the time and usually overnight the deer will be all over the place where the work is done. They are curious and if there is foliage they like they will eat right off the downed trees and bushes. Go ahead and get an excavator when you start to clear if the trees are very big. They will work circles around a dozer getting trees out. Another thing, don't cut the trees, just let flag off the area you want cleared and let the excavator do the work.