Boston area parking for a few months?

[jasoncase]

hey all,

been working on our new (1963) airstream for a solid week now, trying to get it livable and road ready... my wife and i have a job coming up starting this week in boston and we need a place as close to the city as possible to park and plug in. the job goes until about thanksgiving. if anyone has some advice, please let me know. i'm not looking for anything great at all, just a piece of safe ground to put a 23' safari and sleep at night... of course we'll pay who ever the land belongs to, as well...

all help is appreciated

thanks again
Jay