I'm planning a road trip, approx 2 1/2 weeks in August, with my parents (76 & 78) and my 20 year old niece. We're leaving from Idaho Falls, heading up to Vancouver, down through Seattle, and then heading down the West Coast as far as we can get, depending on how much there is to stop and see along the way. My parents won't be able to drive extremely long hours (>8 hrs), every day in the car, but I'm thinking we can get to San Francisco.
We'd rather stay in cheaper lodging (Motel 6 Super 8, etc...), and spend our money on "DOING" & "SEEING" things. My niece and I definitely want to do some things that my parents may not be able or want to do (i.e whale watching (Vancouver or Seattle?), etc... We do enjoy national parks and awesome scenery, but we obviously won't be doing a lot of hiking.
Any ideas on best routes and what there is to see?