There are 2 in Lynnwood on hwy 99. Around 128th. SW. Lakeside is the older and LOTS of permanets. Best choice is the newest, about 3 years old. Slightly limited for BIG rigs. Will try to get name. If you look up it will have the largest address. AVOID Twin Cedars, a DUMP. I just tried 1 search and all that came up was TC and Hayloft. I wouldn't stay at either.
FOUND IT!
maplegroverv.com 1-866-793-2200
They have only 5 large sites so book early.