As I've mentioned before, I'm currently playing in three different 1e/2e campaigns. Essentially, my D&D group rotates between three different sets of PCs in three different game worlds directed by three different DMs. In addition, others will occasionally run one-shot games, sometimes with an existing particular combination of PCs and World, other times with a completely new cast, location, or even game system. We settled on this arrangement because we are blessed (or cursed) with a surfeit of DMs, none of whom really have the time to devote to the preparations a regular game would require. The end effect is that a given DM may go a month or more between running a session; during which interval he is reduced to the lowly status of player in the games of the other DMs.
Each regular player in each campaign typically rolls up 2 PCs to play, giving a total of 8 active characters. This allows us to accommodate those players who are only able to attend sessions infrequently, as well as curious passers-by who want to try out the game. The guest player will assume control of an absent regular's PCs, or one of the attending regulars will loan him one of theirs.
As you might expect, this jumble of worlds and players can lead to a bit of confusion -
