The Bomber dinner is still there, at least I was there last year for the Cruise in. The Airplane at some point will be removed for restoration. There is a little museum on the parking lot, with great military?airplane stuff, and pieces of the Bomber.
It depend how much time you have and if you are here during the week end. The club I belong have one monthly meeting on Sunday, you could be a guest, and see some models, built or in progress.
Another store is in Hillsboro, Hobby Shop, you can find a lot of stuff to. But it will be around 30 minutes from PDX.
The Bomber last year...
The Bomber Burgher, with the Secret Weapon, if you eat all (french fries included) you get a prize...