Your not going to see any deer if they are blowing at you. Are they spotting you entering the woods or picking up your scent, some detail would help. Getting blowed at means they, without a doubt, are aware of your presence and are warning other deer. If one gets wary, flips it tail around, and trots off that isn't going to ruin the day. Deer can be skiddish and act that way over nothing, but blowing means they are very aware of a threat.