Great references. The "On Ground" system by Champlain is offered for precisely my needs - partially in ground.
I also spoke to a rep from Hydra Pools, makers of Hydra, Cornerstone and Pinnacle in ground pools. He said that if I was able to use a berm of dirt for backfill, sloping away from the pool 15' to 20', that would be sufficient without retaining walls I forgot to mention in my first message that we have plenty of room; the property is 5 acres.
Which leads to another question: The Champlain pools are steel walls and the Hydra pools are polymer walls. This pool will be located in sub-tropical Central South Florida, and anything put in the ground is liable to rot. I think I would prefer the plastic panels, but I'm open to being convinced one way or the other.
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