do you know everyone whos going? cos if you do one of them could tell other people about your party, then bam!, you have crashers >.< girl near my place had 20k worth of damage done to her house cos of that huge groups of people tore her toilets out, destroyed the electronics, burnt the photo albums, and took all there clothes(and her mams wedding dress) outside and pissed on them. don't mean to scare, just a precaution. :D