Fairly familiar, I'm there every couple of weeks. If it's T5 then follow the signs up the ramp and park in the zone designated for pick up, park and go through to the terminal. For some reason I haven't been able to work out half of this is taped off and has been for months, but at 5am you should have no problem. It's free for up to 15-20 minutes, so check on a flight tracker if the flights going to be late.
Also, to avoid missing each other, agree a rendezvous - there's a Costa stand in front of arrivals, so maybe pick the right hand side of that as you look at it.
Should be a doddle!
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