Oh, actually, we can make an Etherpad for you, and then participants can edit the list themselves. So I think all the moderator needs to do is to create the breakout rooms and help people figure out what to do, which could be partially handled by instructions in the pad.

Alternatively, LibrePlanet experimented with LibreAdventure (based on https://workadventu.re/) and minetest for more of that "walking around near interesting things" feeling. Is that potentially interesting too?

Sacha