Just a couple suggestions. Sunscreen, odorless if you can find it.
If you don't wear contacts, you may not think to bring eye drops, but it can be a big help to rinse the dust from your eyes.
Bring sturdy tent stakes that don't pull out too easy; can be a big help in the wind, including enough stakes for the tent(s) and blind(s).
Lots of parachute cord to tie or stake down anything you don't want to blow away.
Be sure to bring a small wisk broom to sweep the dust out of your tent. I have camped out in a couple of dust storms where I thought I was going to choke to death. A small, fine-bristle whisk broom is a big help sweeping the dust out.
While it may not be much of an issue where you are planning on hunting or camping, if there is a possibility of rattle snakes, make sure you know in advance where the nearest hospital with antivenin (antidote for snake venom) is located. A GPS can be a big help in providing coordinates to medical emergency personnel. Plus, you may not have cell phone coverage and may need to drive some distance before you can reach 911. It helps to drive in the right direction and not away from the hospital or medical clinic.
If you have not spent much time in a prairie setting, if you drive off road, don't pull off a track and park in tall grass without letting your catalytic converter cool off first. I watched somebody's truck burn two years ago because they stopped and parked on tall grass and started a grass fire. Most ranchers I have spoken with prefer you park on a track/trail/prairie road period. If someone needs to drive around you, they will. A vehicle parked on dry grass is more likely to start a fire than one driving over at 5 to 10 miles per hour.
Also, I suggest bringing a tripod to photograph sunrises, sunsets, and the stars at night. Brush up on low light or night photography if you are not familiar with doing so. You can end up with some amazing photos, including distant or not so distant lightning storms at night.