Though I don't know you much outside of the internets, I think you would like Seattle and environs. Plus time it well and you could catch a ballgame at Safeco and have an awesome salmon sandwich (unless you don't like salmon). PM me if you decide on that area and I'd be happy to share with you what we did on our trip there. Also - if you go to DC with Mrs. NMF before your school trip, you will not run out of things to see. Will. Not. I mean, dude, you're a history teacher. Plus you'll be that much more acclimated to the place when you do take your school trip. (Also, time it well and you could catch a ballgame at Nationals Park, which is no Safeco, but is OK.) Consider the good ideas you're getting in this thread, but your short list is kind of like your gut reaction for what you want to do - don't discount it. Edit: I should add that I'm not a foodie either, but that salmon sandwich was the bomb.