Rendered model on top of a backplate with real location HDRI

[Josip_ZG]

Hello, Keyshot people!
For the last week I've been having fun and pain with integrating the rendering of a modeled scene on top of a backplate image of the real location. I also took the time to take some panoramic shots of the location, going 360° in different inclinations with a camera and combining different exposure setttings to get the most out of what I hope can act as an HDRI and reflection map.

For the night scene, I used a completely different environment instead of tweaking my original location day environment. That is especially visible on the reflective postament under the glowing tree. Maybe that was a mistake, but most of the problem is caused by people. You can see it's not finished yet and some people need shoes or even more clothes, but that's no biggie. What I wanted to ask you is if there is a way to blend in those people better with the whole image. From my head, I only know I would make them a bit darker, a little more blue to mimic the cold light and desaturate them. Don't know yet if they will still look to real compared to everything else, but it's worth trying.

I would upload an environment map here (it's not good to be used as a background though because it was created without a tripod, just my hands and patience.) You can find it on the KS cloud under the name EL-TO Square.
Doing this for a friend and for me as a practice, so I want to learn as much as possible here.