Is there a group code we should be using or is there a good third party site that one should recommend?

many thanks.

It's on the Mindvention website when you registered.

At this late date, you may very well have trouble booking a room online for four nights at the Palace Station. Not to worry. Call the hotel midday (when the reservation staff are not busy checking in and checking out folks) and they have creative computer ways to get you into the remaining rooms. I finally booked a few days ago and Helen was lovely to speak with, patient, helpful and successful. Looking forward to seeing everyone in six weeks!