I wouldnt say we 'dont have landing rights' in kusari. I often smuggle goods into honshu or kyushu, I just have to be exceptionally careful (no using trade lanes, staying more than 10k from any scanner contacts, etc). There are always people in any location that need goods only a junker (or other smuggler) can provide them, and while it is a big risk going into kusari space, I make my trips very quick, and very stealthy.
We do deal with the blood dragons frequently though, providing arms and other supplies (fuel, food, water, etc).
GC really love us, I get lots of attention when I smuggle them a full load of cardamine :D
EDIT:
I suppose my character is a bit different than most junkers though. He was in the GMG war, and one of the crew members onboard the ship is a kusari VIP, so I've got some contacts in kusari to work with where most junkers wouldnt.