Act like you are hunting the deer - and they will probably be scarce. Hide behind corners as if you were going to spring out or shoot them. In the country, no deer would dare be so bold, and if they are that bold, the get invited for dinner, as the dinner.
Among hunters, it is said that deer will be a lot more scared of someone quietly sneaking around the woods than a noisy group of hikers. It is even recommended to talk and walk loudly with a friend when scouting out new hunting areas rather than sneaking about.