Once you reach out with the VIP pass, for the next month you're looking to set up a meeting time – a time for you to actually sit down, hand them that skip-the-line VIP pass, and get to know each other a little bit.
And offering someone a VIP pass is one thing, but giving them something in that moment is actually the powerful exchange – the moment of reciprocity.
What I've found is, you don't want to give them something like a crappy wristband. A wristband is fine, and if it's a nice material, you might use it...right? Maybe, but since this is for an event they'll likely rip it off and throw it away right after the conference.
What you're really looking for is something with a little bit more intrinsic value.