How much time do you have to bring these things back? A few weeks? months? If you have enough time, you could book a container on a ship. No, I'm not kidding. It takes a few months but your giant container comes right to you and it's wicked cheap. It could bring all your stuff.
Now, if you have little time, I'd suggest you pack them properly and put them in hard boxes and bring them. Of course, that clearly means paying extra $$ in luggage but that's your best bet.
How do you book a container?