Sounds like a good trip you got planned there! I agree with johnsondasw that there is abundant scenery on this ride.
Day 1 - Aug 1, My Home (Vancouver BC, Canada) to Salt Creek Campsite Washington - approx. 60km
You're talking about Salt Creek west of Port Angeles, right? I'm a bit confused by your start point, though. Do you mean Vancouver Island
or the City
of Vancouver? If it's the former, I can see it as a reasonable first day assuming you're taking the ferry from Victoria. If it's the latter, I don't know of any route between Salt Creek and the Terminal City that's going to be 60km. You'd have to break it into a few more days.
Day 3 - Aug 3, Neah Bay to Bogachiel State Park - 82km
Day 4 - Aug 4, Bogachiel State Park to Lake Quinnault (one of three camp grounds) - 100km
I would say if you had the time, break this section down a little bit. A lot of the cool stuff, stuff worth seeing on this section of the Olympic Peninsula, requires side trips from US 101, the main road. And you don't see the actual coast except for an approximately 15 km section between Ruby Beach and South Beach (between Bogachiel and Quinault.) If you had an extra day or two here to play with, you could take a side trip to Rialto Beach, which is a 30 km round-trip, or the Hoh Rainforest (70 km round-trip.) And when we rode through the area in 2010, the National Park campground on the north side of Quinault was closed, but the two U.S.F.S. campgrounds on the south side were open.
Day 8 - Aug 8, Nahalem Bay to Portland (Sister-in-law's house) 153km
Have you figured out which route you'd take inland from Nehalem Bay to Portland? There's a few options, but I would avoid US 26 if possible. While it's the most direct option, it's also the busiest, with narrow shoulders and three good climbs. The other routes will take more time, though.