Sadness - you need to try Litchi for future trips.
You have a lot more range than you think because the Spark becomes autonomous - flies with internal programming from Litchi.
Loads the flight plan to the Spark and when it loses connection, it continues with the mission:
But you need more time than a week to build up confidence.
That video is combined efforts and nerves from 3 years flying autonomous missions.
Just offered the info because I had no idea what experience you have.
In your shoes, I would go up 300 at the launch point I indicated and pan around slowly in Tripod mode, look around.
Maybe a few pano pics up there.
Should be able to see something from there.