Intertwining Cabal Campaigns

I've been working on my local GURPS Cabal campaign for the last week or so, with some progress. I have the big pieces in place; I'm just trying to refine some details for the first session or two so it'll be truly ready to go. I'm not going to try to plan too much detail from there because players always find ways to derail any plan that's too specific.

One of the interesting aspects of this local campaign is that I'm planning on interweaving it with the ongoing GURPS Cabal series of convention scenarios in the same setting. The two PC teams will be operating out of the same lodge and interacting with most of the same NPCs, plus each other as NPCs, adding depth to both sets of sessions. I'm looking forward to seeing what sort of effect this has and how long I can maintain it without serious continuity glitches.