Wait and watch.
You stand perfectly still and do not blink. It frightens everyone around you and they ask you to stop doing it.
Use shuttle feeds to stitch together a map of the area around the mansion. Take note of guards, civilians, vantage points, and choke points.
You do this the best you can. It's not a great map, but its better than nothing. There are definitely guards around, you can see them patrolling the area in fairly obvious red uniforms. Can't tell what they're toting as weapons, but they look like rifles of some kind. The entire plantation area is fenced in with what looks like a fairly tall fence topped with razor wire. There are guards patrolling the perimeter as well as the area around the mansion. The road that runs through the plantation is fenced in on either side.
In terms of vantage points, there are guard towers interspersed along the fence but no natural high areas in the plantation itself. In terms of choke points there aren't really any of those either. Place is a big open field thats been packed full of trees. There's no real natural bottle neck anywhere.
Listen in on civilian radio frequencies. Do the inhabitants seem to know what happened on Semilunar Island?
How hard would it be to (what would one need to do to) shut down all media and civilian communication on the island (radio, TV, internet, cellular, etc.)? How about selectively shutting down communication on portions of the island?
How hard would it be to sever portions of the island from the power grid?
If vet teams have not yet deployed the portal: capture the video feed from Sir Jackson's suit, digitally zoom in using my datapad, use an existing (or write a new) program on the datapad to make the resulting video as clear and unpixelated as possible, and then get ready to send that video to him if it's successful. The idea is to make a digital binoculars program on the datapad that he can use.
They don't seem to know whats happening yet. There's reports from sources not on the island itself about fires being seen, but nothing specific.
You could shut down major ones by destroying the transmitters and receivers, but you'd have to completely knock out power to get rid of all of them. Or almost all, someone might still have a battery powered radio.
You'd need to find the power station and sever the lines. Depends on when you do it for difficulty. Then again, you do have an invisible teammate in the form of lyra who could do it in broad daylight and not be noticed.
((let's secure the mansion))
fly up high near the mansion and look for armed individuals and the general lay out of the mansion ,
if any armed people fire at me react with goop grenades and stun bombs set to knock out (I think that's 30%) while broadcasting to the general area this message: "We are the ARMy, we are here to save your lives and with your help save the human race from the coming darkness, either lay down your weapons or we'll personally make you do so."
If night, fly around and get a general ideal of location, then drop Gus and Draco on the roof of the mansion and start taking out armed individuals while having Gus and Draco take nonlethal shots while broadcasting the same message as above
You do a quick fly over and remain undetected.