As above we always pick up from the drop off to avoid the car parking charges. The downside is it can be a little tricky to find, how familiar is the passenger with the airport layout? The North Terminal drop off is on the ground floor and through one of multi-story car parks (on the rhs as you look out of the terminal, as you’d expect the drop off isn’t sign posted from inside the terminal. Make sure the passenger has phone battery and calls you when they arrive.
I think Micky D’s got wise to people parking there (they have at Heathrow) so now unless you buy something you have to pay (or that’s the threat anyway)