You'd have to double check to make sure it's family-friendly, but the Eagle Creek Saloon has great burgers. If nothing's changed since I was last there (been a few years), they come in baby, mama and papa sizes. The papa burger is big enough to feed 3 or 4 people.
There's a little blurb about it about mid-way down in the right-hand column.
Eagle Creek Saloon
31281 N Us Highway 101
Lilliwaup, WA 98555
re: porky pine
I second the vote for Robin Hood, a longtime favorite in the area. It's very near Alderbrook Resort, which is a lovely property to walk around but the dining room's not the most reliable. But they should have their outdoor seating area near the docks open and could be fun for a simple burger or sandwich type meal.