We'll be staying in Manzanita 4 l/2 days the end of July. Depending on how early we leave we'll have about 7 hours on August 1st that we can do some sightseeing before we need to be at the Portland Airport. To avoid almost a 2-hour round trip drive to Astoria on a different day, I'm wondering if we should visit Astoria on our way to the airport or if we'd be too rushed. We'll have kids 14, 17 and 20 with us. The Maritime Museum, Astoria Column and the Flavel House all sound interesting to me but I don't know how much time to allow and what our kids would like best. There are also Fort Clatsop, Fort Stevens and Fort Vancouver and Cape Disappointment (both in Washington) that might be worth a stop. Your advice on what to see that last day, how to time things and, especially feedback on the forts will be appreciated.