Hasta La Motion!

I’m collaborating on a short film in which I’m in charge of the visual effects. The film is set in a world where time has simply stopped so objects that were moving in the air when time stopped will still be there now, similar to Carousel. I’ll be composting 3D objects (which must look realistic) over the live footage. The whole film will be shot handheld (with a steadicam) so I’ll also need to matchmove the shots that will have ‘floating’ objects in them.

Shooting will commence soon so I’m hoping to get some tips about what information I need to gather whilst on set for the shots requiring vfx.

I have in mind:

measurements of the area/objects
distance between tracking markers (if any)
camera information and lens details for the shot
plenty of photos for reference
chrome and gray ball for lighting/reflection reference

Is there anything I should add?

Do people generally use HDRI probes for lighting?

I would just like to hear from people as to how they would approach this as this is my first time in this position.

Thanks