So the group has two alternate campaigns now? How will that generally affect the regular game? Will you just switch off between the two whenever Dru or someone else can't make it for the main game?
Incidentally, I saw an idea in another thread that I thought could relate to your party. As mentioned before, the party has a huge group of cohorts, companions, allies, hangers-ons, and random residents of the party's home base who are often very powerful but not able to work with the main PCs safely. Have you ever considered a mini-campaign or adventure playing Meepo and Co. or some other grouping of that sort? I mean, the current events with Zinkman might have rendered the point moot, but if it's still possible it could make for an interesting diversion.