How big of a pile do you accumulate before making a run?

My smaller van would do that in one trip loaded proper , Yes I have that in my life, to the annoyance of all who are near me.I am working on it. that inventory is the easy type load and go . When your inventory is building and it's the type that has to be cleaned up for a good - AL run - Or copper run - that is actually the on going pile hard to get rid of as there is always another item to dismantle & put in the area .
I saw a scrapper who was tossing it all - some AL ( clean ) 2 computers (win 2000) Short steel and some mix this older then me man, could care less , And by the way i have been told in the past by the head management " Do not Educate - Explain - to any customer about what is what - CU AL SS Short and so on "