For anyone who is curious or looking to do something similar here’s the outcome.
All made out of scrap 2x4 that I ripped down to 2x2, deck screws, and a tension baby gate for the door. All materials were repurposed so this was a free mod that took no more than 90min start to finish. It’s very rough but did the job and doesn’t look terrible. When I eventually Reno the trailer I will be incorporating something like this into the design!