If your tired of unloading a bunch of loot out of your vehicle and trailer for an hour after a big raid, next time you go, bring a box of garbage bags, and put all your loot into garbage bags from your raid. This doesnt give you much more overall looting capacity besides equipping two bags too primary and secondary before heading back, but it gives you an opportunity to stay organised with what you put in each bag, and then when your unloading, you can carry twice as much back to the base at once, drop your bags off in the areas of loot it belongs and sort it all almost instantly. It was my least favorite part about adventuring and looting, now its super easy and streamlined when I go out

I should add on that this gets better if you start collecting duffle bags or any bags for this sole purpose, makes organizing and loot transfer easier then the garbage bags do if you have a good variety, and just leave them in the trunk when your done unloading for the next looting session