Second round dried! 10 dozen eggs, still in flake form, filled 2 half-gallon pitchers.
They could be kept just fine as flakes; the only reason to run them through the blender (i.e. powdered) is for a faster re-hydration time (< 10min) - and smaller storage footprint.
Left as flakes, mixing up one part flakes to 1.5 parts water in a small covered dish for a few hours does the trick.