Glad the move worked. My two broodies hid their eggs so well, it was only a day or two after finding them before they had chicks and then I moved them into a brooder in the barn. It was in Nov & Dec! The one had made a huge mess but not until after she was done hatching, and not on the eggs or chicks. Now that you mention it I remember having to scoop out some pretty big poops for a couple of days!
I'm going to put a dog crate in one of my coops to see if I can get one to go broody. I'd rather they do it in the coop then like the others did, out in the bushes and have to worry about predators! I'll use your experience an make sure there's room between food/water for her to get up. What size dog kennel are you using?