I have booked platform #3 on Broughton Island, and this wooden platform (seen here, which is between one of the grassed sites in the foreground and the long-drop toilet up the hill) can accommodate up to 6 people.
As the trip involves about 12 miles of ocean sailing, weather will obviously be the determining factor as to whether the trip is on. There are no other facilities there other than the toilet up the hill (although there are a lot of fishermen's "huts" in the next bay), so participants will need to be self-sufficient in terms of food, drink and shelter, but it is a very nice place to visit.
Booking fee is $18 per person (bargain!)
Please let m know if you want to join us on a great weekend.