Hi everyone! I cannot believe how amazing this forum is :)

My partner and I are planning a 3 month trip to USA/Canada over summer 2012. We are thinking of going June-August.

I was wondering what people's suggestions are when planning a trip from San Fran up to Seattle (and eventually Vancouver). We want to see as many natural wonders as possible. We were thinking of allowing 2-3 weeks and hiring a car or campervan for the leg.

What does everyone think? I really do not know where to start and have no idea what the best places are! Any help would be highly appreciated!