Here is something you can do to make sure you stay there on that piece of land. get mail delivery to you there, plus I'm sure people will testified that you been there over 30 days.
now thanks to nyc tenant laws. you are officially a tenant of that park :p. they won't evict ya without going to tenant court. and if you squat long enough claim land owner rights after a few years.
that learn that stupid company for letting you guys stay there lol.
I like to stick it to The Man, The Man happens to be Liberal in NYC(power Structure).