Just north of Olympia, WA at the Nisqually exit off I-5 is a drive in called Tiny's -- or at least it was there 3 1/2 years ago -- opened around 1969 -- always eat there when I'm in the neighborhood.

Another place -- hwy 12 East off I-5. Spiffy's -- 1# burger and GOOD. It is a very nice restraunt now, but when he started it was one of those small mobile diners, good cakes and pies too.