Yes! I think FRSO has the right idea on embedding with UPS workers to make them more militant. It also creates a real grass-touching consciousness among the org members. Logistics workers should be able to flex their muscles, as you mention. At the same time, they lack class consciousness. Getting experience trying to organize and educate such people is the best instruction any communist can get, as it will not go well most of the time and you can use it to build patience, discover more effective approaches, and get a better read on where US workers are at, politically.