Noobie question: when do you open your boxes?

My question is just that... do you open your boxes, bags, etc. on site or do you normally pack it up and open it at home/your own storage unit/thrift shop?  I have seen the shows where they open a box and toss it just to find that "good stuff".  I think it would be better to open and sort when you are in your own element or am I wrong?  BTW I love to hear all opinions. Thanks.

Some things I open right on the spot to fill my curiousty, but for the most part it all goes with me and gets sorted off site.

I'm a fan of on-site, but just to sort keeps from trash. This way I have one truck going to the dump and one to my house.

It depends on the stuff in the unit and how large the unit is and how much time I have.

When I encounter a unit with stuff just thrown about and not properly packed I tend to sort out garbage into separate garbage bags and put the good stuff in boxes or totes.

When I am not pressed for time and have a small unit, I tend to look through the boxes on site and look for goodies.

When I have a large unit, no time for peeking, load it up and get it out.

 I allways open mine when I get home but thats generaly because I'm 80 or 100 miles from home and the sun's going down.
 Also I dont bring this stuff to my home home I have an out building 100 feet from my house so that I dont bring buggs scorpions and bad spiders into my home. stuff gets a good looking over first.