I'm getting out of the desert of Palm Springs for August and traveling back to my old stomping grounds in Seattle. I will be caravaning with multiple cars on the way up on I-5, but will be returning as a solo car. I would like a leisurely trip on the return leg and no interstates!!!

What are the 'rules' regarding dogs in National Parks? I will be staying at a 'pet friendly' hotel in Seattle and am aware of several motel chains which accept dogs, but am concerned about the sight-seeing aspects of traveling with a dog.

Any suggestions would be appreciated. Thanks