Ray's Anima Campaign
This (Obsidian Portal) should help collaboration while I am in Ireland. Should be useful before and after. Has build-in Adventure Log feature so plays can catch up if they miss a game, plus a full Wiki for keeping notes about the world and characters that you meet. Calendar and Forum features may better be used in Google Calendar and Roll20, but they are here too, and we can decide to use them if it turns out to be convenient.