Nothing will be as fast and efficient as a pumper, and making your own auger system seems ridiculously time consuming for this one project. But what about a tractor bucket? Do you have a fairly large tractor where you could make trip after trip from the truck to the forms? Might work for footings, but not for slabs. The finishers wouldn't like it, the reach is very limited and it will be slower, but it meets your goal of no pump.
580C backhoe with a over sized bucket, extendahoe on the rear is parked on site. I think I might get some crusher run and just build a road up to the footers. Then pumper for the icf when that time comes from the back side. The floor she's not sure on cause of a root cellar.
Can always remove the road later as well.