Drive to the marked location in Rogue Camp to pass the time and start the mission. After the scene, approach the helicopter landing by the gas station and wait for the lone guard to move away. Plant the tracking device on the helo then carefully go around it.
The researcher will be inside the building with one armed guard. Carefully move past them and hide in the dumpster right beside the door. This will allow you to eavesdrop on them in relative safely.
Once the researcher and her escort relocates, wait for them to go around the corner before exiting the dumpster since the sound will get the attention of the guard. Keep low and follow them to the next location. There’s another dumpster that you can use so go in there and wait till the Listen gauge is filled.
Now you have to get back to your Bike. Look around before exiting and when clear, exit the dumpster and head back towards the chopper. Look around for guards then vault over the concrete barrier. From there, you can run back to your bike to complete the mission.