Don't use play sand. Chickens are susceptible to respiratory issues and play sand is too fineI free range so the only "run" I have would be the bantam pens. But in winter and while I'm away, they stay inside. I have rib damage and it makes cleaning the coop painful and take longer, so I've always tried to get help and/or find ways to make it easier.
A poop board would be a great idea! I should look into that.
What kind of sand do you use in the run? Is it just any sand you could buy at Menards, or is it a certain kind?