We are planning a 4 day trip from seatlle , wa to Redwood national park, CA. Our main focus is to see Redwoods. How much day should we spend here in redwoods with a 2 year old ? so mainly want to do scenic drives & relaxing here. No hiking or adventure things...If 3 day is sufficient enough in Redwoods , thinking about doing the Dunes & cannon beach in Oregon on the way back home to seattle on the 4th day Or will that be too much to do within 4 days. Also please help with the must to do in Redwoods ?