Eureka is my hometown, so I'll post this on my facebook and see if my buddies have seen it since yesterday. I'll ask them to look out and I'll also look out in the Chico Area as well. I feel your pain man.
I'm not very familiar with Arcata, but in Eureka I'd look in the neighborhood across from the Winco.
Also, if you have a buddy with a truck, maybe go to the ferndale riverbar (the farm entrance) and search around the quad track area or bonfire area. In my years, I've only seen one abandoned truck there, but could be worth a shot.
Could you post your license plate number? Maybe more pics if you have any.