I would book three lodges!
May 2016 is so far away, I can't see this list not growing to 20 by then...
Jakov - thanks for starting that list - it makes numbers clear at a glance. It's probably also a good idea to book 3 lodges - the worst that can happen is that we would lose £100 if we cancelled later - not a big problem. Let's wait a few days; I expect things will be clearer by the end of the week.
Perhaps we should also think about closing the list when (if) it reaches 20 or at most 22. Three lodges can take a max. of 21 people all with their own bed - more than 7 in a lodge would mean two people sharing a bed - and I will be staying at home.
To make the bed situation clear to members; each lodge contains:
A room with a double bed
A room with a single bed
A room with two single beds
A room with two adult-size bunk-beds
A camp-bed which can be used in any room
That's 7 beds, so a max. of seven people. But I will check out the camp-bed to make sure if it is really usable, so in the worst case we might only be able to handle six members per lodge.