Also, there isn't really much that isn't worth being picked up, because everything can be sold for money. The only time most people will be leaving something down is when their carrying capacity will be at limit
Even then I pick it all up and just send the junk to camp. But I'm new so I don't know if there is a issue with that somewhere else. When I did it, I just loaded up camp when I got back at the druid grove in front of the vender and just collected all to sell, which meant carry capacity wasn't an issue, just the extra step of going to camp and it not being very realistic basically having an invisible camp porter around.