Two weeks? That is a serious geek meeting.
You don't have to go for the entire time, but you won't get to pick your cabin either.
I went in '08 and '09 when it was only a 5 day event. That wasn't too bad, maybe a day too long. Anyway, the next year it went to 10 days (now 14) and there was no effing way I was staying that long, so they took away my cabin, the one I reserved in my name for 2 years running. Sure I could stay somewhere else, but I picked that cabin for a few damn good reasons and none of the others are quite like it. That left a bad taste in my mouth so to speak and I haven't been back.