When I used to spend time on the highway system I frequently ran across entire families (usually men; uncles/cousins/grandfather/father/son) who rented giant RV's and then converted them into mobile fish processors as they camped in them. The catch went back to Europe as checked baggage, and they were all in on it, even canning and smoking right in the campgrounds.
They loved salmon, and they told me the trips were annual events.
Since I've been off the road awhile, I 've been wondering if this still occurs.
Any input would be appreciated...