Not a Roadtrek doing my due diligence for my old Toyota I noticed a lot of dissatisfaction with 5k AC units so skipped those. I went with an 8k LG unit and find it is just right for hot humid FL. Just adequate during hot humid days parked in the sun and not too big that it does not keep humidity down at night. Also the Honda 2000 will run it under all conditions. I also added a hard start capacitor to the AC and the Honda runs the AC in ECO mode with no issues!
Things have changed a bit, if I was looking for an AC today I would be looking at the new inverter window units. Such as the Media. I am not recommending the Media using it as an example and there are several other brands.
My not so humble opinion and worth what you are paying for it.
https://www.homedepot.com/p/Midea-8-000-BTU-U-Shaped-Inverter-Window-Air-Conditioner-WiFi-9X-Quieter-Over-35-Energy-Savings-ENERGY-STAR-MOST-EFFICIENT-MAW08V1QWT/315241074