Thanks for the input, guys! I think I'll follow something closer to S'mon's example, though the other posts also helped with ideasThe main thing I'm torn over now is whether to make the first session "part of the campaign," or just make it tangentially related to the plot. Hmm...
Why not make it a "prequel" -- though the players won't know it...
I.e. When you have the actual campaign (starting from session #2) somewhere down the line, maybe session 3 or 5 or 10, make the plot start to connect back to some event that happened at the prequel.
Maybe that was the day someone took power and the prequel PCs were there to witness part it, which led up to the eventual civil wars.
Maybe the prequel PCs were fighting some kobolds in the mountains.. and later in the campaign, the actual PCs find themselves in those same mountains with kobolds serving some draconic overlords, etc.
i'm a big fan of continuity, so something like that would be a 'hook' for me to see that the game is that involved and dynamic to account for what the players did during the prequel (did they succeed at something? did they set someone's plans back? etc - the actual campaign has the consequences of that as part of its history).