If you plan on rinsing out your coop, then the floor can have a very slight slope and linoleum is good. It can be covered with wood shavings, sand, etc that would need to be replaced when you clean out the coop. Plywood or tin in the bottom of the nest boxes with straw, wood shavings, pine needles or even astroturf (can be washed with a hose and put back in). In my crate coops, I have a wood floor that I shovel out the poops and bedding material once a week.
I am also in the OKC area. This is my second year with chickens. I'll tell you what we've learned so far (at least our personal experience) about bedding and mobile runs. We've had good luck with pine shavings in the coop. I used DLM in the winter, but not in the summer. Mostly because no matter what you do it stinks with the heat, and it hides all manner of insects and larvae. It also seems to keep the coop hotter inside and can have an affect on the ventilation. I use about 3 in of bedding right now. Sweet PDZ under the bedding helps tremendously, though it's no match for heat and humidity once there's a good amount of poop built up in there. We try to be vigilant about the smell because we live in a neighborhood, and want to keep things amicable. If you are using a mobile run, you need to make sure it's shaded during the hottest part of the day, and move it when they've exhausted the weeds and grass underneath to prevent boredom. We used a mobile run last year, and provided artificial shade via a huge piece of plywood board. The wind kept knocking the board over so we had to figure out a way to keep it stable. You won't have to worry as much about shade when fall comes. Welcome to the thread, and the world of chicken keeping.
I'm all about a sand floor, it is perfect imo. The poop dries out quickly stays dry, easy to clean (dry poop is non smelling poop)
Do you put sand in the nestboxes as well? I have a dirt/sand run, so sand gets tracked in the coop. I have noticed that the fine layer at the bottom keeps poop from sticking to the floor, but turns the poop to dust, and makes wearing a mask a really good idea. I may try a sand floor in coop to see how I like it, but will probably end up using shavings over the winter since sand gets so cold.
I have not put sand in the nest boxes I didn't want to encourage digging or dust bathing in there worried they would break eggs. We use a rake gently over the top (one of those that look like a fan) to put it in a pile then an old broom we shortened (stiffened) the bristles and a dustpan on a handle (so no bending)
