Bob,
I have thought the same thing. I remember my dad making me go out in the yard with a shovel , wheelbarrow, and sand,, filling in the divets in the yard a few at a time, then the grass would grow through. By the time I was in high school our yard was pretty smooth,, LOL
a spreader would be great, let me know when you get it sorted LOL
I thought first step was to cut grass real short, then maybe use a drag bar of some sort to spread the sand,,