it seems to me that a nation determined to control wired network traffic within its borders cannot be circumvented. if they can control the ISPs and observe packet flows then they can just obstruct any connection they cannot conclusively prove is acceptable.

it seems then that store-and-forward ad hoc p2p (ie extremely high unpredictable latency) is the only option for those who can reach some node with a connection to the outside (maybe laser near the border). or perhaps really clever steganography with outside partners assisting.