If you are starting from downtown and goal number 1 is to minimize use of busy roads - then I would get the 94 bus to Sherwood and then pretty much head due west through the lanes to Yamhill, then south to Carlton, then due west again on NW Meadow Lake Rd. which becomes NW Nestucca Access Rd. which becomes Nestucca River Rd. which becomes Upper Nestucca River Rd. which becomes National Forest Dev Rd 85, which becomes Blaine Rd which takes you all the way to Beaver and 101, then it is a choice of either North or South depending upon which beach you prefer.