while i find the idea of setting up an unregulated money exchange in no-one's land very appealing, you can forget about any reliable link with the banking system IMO. So the only way it could be made is just by trading in person no questions asked, like pirates and cowboys used to. So the traders would have to pay a visit by boat or maybe helicopter with bags of monies or gold/silver if they wished to buy btc.
[edit] (unless it could work by a global network of agents -but then there would be no point in going there).
And to deal in physical assets in no-one's land you would better invest in maximum security, like an underground bunker and an army.
But that no-one's land could be the right place to startup a sovereign bitcoinland too. It would even solve any cooling problem for miners. It would just take to setup a nuclear power plant or 2 there.
this guy nailed it. how can an american/europeans get through customs of their home countries with their suitcases filled with bank notes to then send down to antarctica.
also, trying to set up a bank that is fully compliant and in a relationship with banking systems requires alot of red tape of the country you wish to link to, to atleast allow wire transfer. making you part of their banking system and rules.
thirdly its easier and cheaper to set up a credit union within a country rather than to buy land, build buildings, roads, utility/sewerage piping, water side jetties, hotels etc just to set own banking rules. so.. start a credit union in a country that does not have such draconian laws around bitcoin. (try for instance jersey in the bristish channels)
as for the sovereignty part.. unless the land is owned by the queen its not sovereign, but putting that aside the positive i see about having a bitcoin town/city/land is that we the people can go back to the basics of common law (no loss or injury) and live the simple life. without the corporate money grab of fining people for stupid things that wont cause others harm... this can easily be made so within different countries with the right education about laws and contracts. but i wont meander down that road in this post.
back to the subject of a bitcoin city/land, it has been worked out to build a city of 50,000 residents costs atleast $4billion. im sorry but no one is going to contribute over 90% of the entire bitcoin in circulation, for one city. its easier and a hell of a lot cheaper to get fiat investors to help fund a credit union rather then building a small town/city for bitcoiners.
my overall opinion is that for cheapness, effectiveness and actually getting some momentum and achievable goals of bitcoin finance, its better to start within a country with less rules first, again i mention jersey. to then expand later.
and as for a city/land of freedom idea that people also dream of, i love the dream, but i can easily see it becoming a concentration camp where bitcoiners are thrown into and only allowed to use the coin within... so again better to make the world bitcoin friendly by having bitcoin credit unions expand from the starting point of a de-regulated country, and then expand with branches in other countries once the regulators see that the idea/template works.. rather than effectively giving up making the world bitcoin friendly, and having a concentration camp effect..