Best way for residents to get to the airport?

Heading to the mainland for travel for a few days. What's the best way to get from Okinawa City in to Naha airport?

I've driven to the airport to pick people up, but not yet to fly myself out. Some places long term parking at the airport is the norm, but in other places you're expected to park further out and take trains, or possibly hire a taxi.

Do people take their car and park in long term parking at the airport, or take a taxi, or have a friend drive them?