Here in the South Sound / Coastal area, I don't think our blacktails drink! I have watched ponds and water holes for years and have never had any luck doing it. Of course I have seen deer drink from streams, but never when hunting. The fall is so wet and the underbrush so thick that they don't have to move from their beds to get a sip.
Blacktails in washington do not need to go to lakes rivers ponds etc. al they need are some wet leafs from the mornin dew or wet moss that they might eat anything that soaks up water or lets water puddle up on. Blacktail are very different from mulies and whitetails in there eating drinking and traveling habits. the bucks in my area are just inside the timber of a 3 or 4 year old clearcut and they just hang out right there. Good luck to everyone on the OCT 13th opener.