Aberdeen is a shit hole but you'll probably be more likely to get stuck in Florence, nothing but a bunch of old/rich people. Check out the beaches in Bandon they're pretty awesome somewhere on the southwest side of Bandon there are tons of gorse so watch out for them they look like little pine trees that grow out of the ground and have a nasty prick to them but there is tons of land to camp on because of them. In my experience all the towns along the Washington coast kind of suck and everything inbetween canon beach and coos bay is pretty awesome except florence.
Are you heading west 101 along the coast or are you going to head east down to Kimilche and crossover using the 108 and 12 to the coast?