Are most people on board with the 22nd? Also what activities happen on which nights or can it change?
The 22nd sounds good to us. It is the day we arrive. Last year, school girl night happened on the day of arrival and I apparently met people that night who went home in the next day or two. My memory is foggy from that night. That first day by the sexy pool after an early morning of travel always gets us. Most years, we take a siesta on the 1st day and stay in bed until the AM. If we don't show up, we may need someone to knock on our door!