Auckland Airport Parking Query

Hey just wondering if anyone had any experience recently trying to book what I would describe as "medium term" parking recently at Auckland Airport?

We are traveling to Queensland for a week or so, and want to book 8 nights of covered parking.

The last two times we have traveled, once for about 10 days and the other time for around 3 weeks, we have pre-booked a park using the L2 -L4 option in the new transport hub. Its been ideal, turn up, park, straight into the terminal and away you go. Come home, car is there and away we go.

Now it seems this has been restricted to parking for 5 days max. OK, fair enough, so Im looking to see how I can "self park" in a covered car park at the airport for 8 nights. And Im buggered if it will let me do it. The only options that come up for our dates (next week) are park n ride (I definitely dont want that) or "Valet covered parking". How do I just book (for example) standard covered car parking in car park D (I think)?

Has anyone successfully "self parked" (covered) for more than 5 days? How did you do it and what options did you select? Im not super bothered about the cost of the valet parking, I just dont understand why, or how, we can't park the car ourselves and collect it when we get back? Valet just seems like an unnecessary hassle.

Any tips or advice appreciated. I feel like Im missing something simple but I can't seem to work it out on the Auckland airport site! Thanks