According to the EU (I know, I know) the gas giant Endor has nine moons. The mining operation could take place on one or more of these moons, and we could see a partially destroyed moon passing in front of Endor prime in one shot. There’s some potential here for striking imagery, ala Avatar:
I think planet Endor looks way too big.
Jupiter view from Europa in a video by a NASA scientist at 2.44:
https://www.space.com/28705-how-to-live-on-europa.html
Europa distance from Jupiter is less 700000 km.
Ganymede is over 1 million.
Callisto 1,8 million km
So there is no need that the planet should fill the whole screen
Clearly if this is a moon, a planet must be near by, but not necessarily too close, so when the rebel fleet arrives, it should not draw the attention of the viewers. I think.
Unless it is Space 1999, with a moon on the lose. Then there is no planet 😉