No. You cannot immigrate to, emigrate from, or be deported from or to the war island. It is completely disconnected from the rest of the world. Even family gold is disconnected. Characters on the war island cannot send gold to their families, get gold from their families, or perform region investments. (I would assume that Anaris also disconnected the other family gold avenues as well, including bounties, ransoms, buying regions, using family influence, etc.)
Sadface. I used the old war islands to buff H/P before sending my characters out on political careers.
