I usually use the Valet park and fly. They have a CAA discount so it ends up not costing much more than their self-park lots. The bonus is the Valet lot shuttle comes around more often than the shuttles for their other lots. I have a booking in September for 23 days and the total cost is $236.11.
I don't worry about anyone stealing my car. I don't think a 2011 manual, no A/C, 200k+ km Mazda 3 is a hot commodity for car thieves. 😆