Wow... you are going to be REALLY close to me!
If you are staying in Tacoma, there are some really nice photo opportunities, even at night. There is the UW Tacoma Campus right there downtown and then there is Union Station and the Museum of Glass. The Glass Museum has a ton of outdoor exhibits that are all lit at night. Very pretty and very popular to photograph. If you get down by the waterfront in Tacoma, there are tons of restaurants, parks and a long walking trail that goes right along the Puget Sound. Beautiful western views (and we're actually supposed to have a little sun this weekend/upcoming week... shocking, I know!!!) and it will provide some gorgeous sunset views with the Olympic mountains, the water and the islands around.
You won't find any 'picture-opportunities' from Sea-Tac Airport down towards Tacoma. It's just really highway the entire way; nothing exciting. Although, if it's sunny when you get in, you will have a spectacular view of Mt. Rainier as you drive.
If you are on base, I can't really give you much info, since I've never been on base, but I am shooting a wedding at the chapel there in June and I've heard that the chapel is amazingly beautiful!