There is a reason those tags are OTC for residents and it's a tough hunt. I did it a couple times when I still lived in Kansas. There isn't a ton of public but landowners are usually not terrible about giving permission for pronghorn.
That said after doing the hunt a couple times, I would not do it again. My biggest issue with the hunt is the amount of pressure from those tags being OTC. This is worse because of the low density of pronghorn in Kansas. It was tough to find pronghorn on public, if you did, the terrain is pretty difficult for stalking into archery range. There were two separate times that my buddy and I found pronghorn, were actively stalking, and another group of hunters would come down the road and just start walking at the pronghorn we were already closer to and spook them.
It was a total cluster. It looks like you're a nonresident, so you can't put in for the rifle or muzzleloader tags and that's the only way I would do the hunt again. I harvested a decent 70" buck on a muzzleloader tag in 2014 as a resident. If you actually want to harvest a pronghorn, I'd start building points and hunt WY or CO. If you want to pay $300 for some practice stalking pronghorn in very difficult terrain and an exercise in patience dealing with other hunters, it's a great hunt for that.