"A time is coming when men will go mad, and when they see someone who is not mad, they will attack him, saying, 'You are mad; you are not like us.'"-- St. Anthony the Great, circa 300AD
Other than antenna flags, my husband says you could put a folding or telescoping light tower on it to light it when you are using it to see what you are doing.He is a little concerned it will bounce a lot and beat on the generator since the trailer does not have springs.
I put flags on my 4' hf trailer after my wife and kid got tired of me making them stand on it so I could see it https://www.homedepot.com/p/Blazer-International-Driveway-Marker-48-in-Round-Fiberglass-Rod-Orange-381ODM/202498049just made a pocket for them to drop into when I needed to back up