Actually I think the address restricted ones do count as far as fully illustrated lists go There s a number in Florida like that In some cases they re erroneously labelled or their status has changed and you can get photos of them Fort Walton Mound the Fort Chokonikla Site and Old Haulover Canal to name a few For the still restricted ones there s a few options I ve thought about Contact the historical societies in the areas where the sites are they re usually glad to help with information Also find out who s administering the sites or excavated them Often it s the archaeology departments of state universities Try getting in touch with them If the sites aren t accessible perhaps artifacts from the sites could be photographed with appropriate permissions obtained of course Just some thoughts hope they help