Be patient with AP. They make excellent enclosures but the long lead times can be frustrating. They’re still worth the wait imo. I have (4) T10s with the same RHPs that you’re getting. It’s your choice but the UTH really won’t be necessary. My RHPs give me a perfect basking spot and great ambient temps. The pvc enclosures hold heat and humidity very well. The only times I lightly mist my enclosures is when I see a snake prepping to shed or if I just want to change up their weather dynamics. I live in GA too and never worry about humidity with any of my snakes.