I had an ABG pool in Oregon, but it is way different in Oklahoma. So a new pool cover on my new pool is needed. Do you all recommend an air pillow or such under the cover? And what kind of cover. My pool is above ground, but dug into the hill to make it flat, then back filled on that side and edges down the hill. The photo is before it was backfilled. We will put up a small deck on the left side. Thank you a head of time for your advice.