I have a magnetspeed target indicator. Buy one for your range maybe they would put it up. I purcahsed 2 and gave one to a guy that runs local matches. He purchased a few more after using it once. Hard to spot hits at 1600 yards with a 20mph wind. Not with a red flashing light. It is what I suggest.
I have a few drones. To see the targets at 1 mile the drone would have to be pretty close. To get that low it would likely loose reception. Mine is a phantom 4.
I have a longshoot cam, much better if you want to see where they on the target. Mine is older version when they went by target vision, 2 mile version. Have not tried it at 2 miles. Works good if needed. I leave my targets setup and hardly ever use it. The hastle of having to setup another thing every time... I would sell it if anyone is interested. Hardly been used. $500 shipped.
If all you worry about is hit or not, the target indicator is the way to go. I have left one on a target for over a year and it still worked. Well the glue quit and it fell off after a few months and forgot about it. Picked it up this hunting season. On my shelf now and still works. Should check the batteries are not leaking. Checked, Still good. Some critters may have chewed on the rubber ends a bit...