Long entirely off-limits to tourists, Church & East [http://www.churchandeast.co.uk/tourism.htm] are now taking booking for visits for groups of 1-5 people. An entry visa costs $100 Sealand dollars (£50), the return transfer from Suffolk SX$120 and a day trip/one-night/two-night stay (full board) SX$100/200/300 per person.
Walk. The entire habitable area of the fort is 550 sq.m.