The one concern I would have with running a genset unattended with no one onsite would be the potential for a fuel leak & subsequent fire. Diesel is certainly MUCH better than gasoline as far as combustibility/flammability but diesel squirting on a hot exhaust manifold is a problem. You indicated that you have an camera to remotely view the genset while running to take a look-see now & then but it would be VERY UNFORTUNATE if you noticed a liquid puddle on floor or smoke/flames via remote viewing & suddenly lost communication & control.
As an extra precaution, you should consider replacing all the fuel lines with
braided sst for added peace of mind. Another, idea would be to install a WiFi monitored smoke/heat alarm near the generator. I've
seen ones that claim to send a push notification to a mobile phone. My UPS battery back-up on my PC is set to send a "Pwr Outage" txt msg to my cell phone so there may be a way to interface to a remote PC on UPS at your generator location that monitors the wifi smoke alarm.
But I'm a worry wart when it comes to things like this. However, that old adage "An ounce of prevention is worth a pound of cure" has served me well over the years.