I don't really see the problem. Yes, a big pickup may meet the legal requirements due to weight, but unless you are upfitting it with a utility body, CHP is going to see a pickup.
If you have a utility body on it, then you're not carrying a truck camper on it. Outside of Australia, the two look nothing alike. If you've got a utility body on it, then you're not towing a fifth wheel. So, the only question would be if you're towing a travel trailer with your utility body. I suspect they wouldn't look at you weird for driving by a weigh station while towing your trailer.
Of course, if you're worried because you've been driving your commercial truck and not stopping at weigh stations, then I guess you ought to buck up and be an adult about it and start stopping at the stations as required.
