Low tech here...I mix on a blue tarp, I spread the material out then lift by the edges and corners to roll it into a pile,then spread it out and repeat, I use a steel rake to spread and mix. I think it's easier on the old back than turning with a shovel. Stored in rubbermaid tubs@20-30 gallons so i can move them easily. Rope attached to handle of tote.
View attachment 689027