I can't improve on Shifty's comment except to say if you do take the Ferry to Victoria ( excellent suggestion ) you will need either a passport, or enhanced drivers license to enter Canada. The ride up to Hurricane Ridge is fantastic, but steep. If memory serves it's around a 5000' elevation gain, but worth the effort in nice weather, which is what you may expect in August. I think you can expect some traffic along highway 101 and as well the ride along the Columbia River in August. Oh and the section running along Crescent Lake will take you close to the Sol Duc hot springs, you may find that interesting, but likely crowed. If you have time for a diversion, consider a side trip to La Push, the very short hike to what they refer to as beach 2 is worth it, quite rugged and quiet. It is like anything else, the more time you have , the more you'll see and enjoy. Enjoy