Postage through Aus Post is expensive, but there are other options so that you can pack up some of the bigger items, you can also get insurance, we had to send a huge painting interstate and with Aus Post it was going to cost a small fortune, but through a courier company it was a lot cheaper and they picked up from home and delivered to the address, you can also go through other transport companies even buses (thought you may have to drop off and pick up with these) but it can be a lot cheaper the normal postage

How are you getting up there? Driving, plane? So would weight be an issue?