Holiday Ideas Pacific Northwest.?

We live in Seattle and my husband, son, still a baby and I are planning a holiday week 4th week in July. I think a house in Oregon and Washington, both on the beach, or rent one at a lake somewhere. Wheres fun visit? Let San Juan too often if you do not want to go. All ideas appreciated, Thanks. We want to make a couple of hours drive from Oly reasons baby.

Mount St. Helens and the Bigfoot country? "I can join?

Lake Mayfield Manor Vacation Rental Washington State