As long as you have a good line of sight back towards KC, any of our UHF antennas, from the smallest to the largest, should work just fine. No need to over think this.
I tend to prefer a narrow beamwidth antenna whenever the situation allows it. That helps keep the rate of multipath minimized. Antennas of ours in that category would be the SR15 or 42XG (if you can still find either, perhaps ebay or Amazon), 43XG, 91XG, ClearStream 4, DB8, or DB8e. The ClearStream 4 is available at most Best Buy stores if you want something same day. Otherwise, the rest may be ordered.