It looks like my 7.5' Sami. I guess most mesh dishes look alike in a way. Mine is in 4 panels.
Backplate looks like mine too. That 7.5' should not weigh much. My guess is even with the polar mount attached you are probably looking at 100 lbs maybe. Take the dish off the polar mount first.
Leave the struts and feedhorn as they are if you can handle it without damaging them or the feedhorn in transit.
If you can, keep the Dish whole and just remove it from the Mount and transport that way. If you must split it, you will probably break most of the bolts, just my experience. I would also use Rust Bust or Liquid Wrench over WD40, and spray the night before if possible. May what to bring a Propane Torch for the Mounting Bolts too.