Of course extra eyes are a huge help but I've found that if you can see the poles or towers you can usually determine the route of the otherwise invisible wires. Pole tops near highways or accident hot spots should at least have a high visibility finish of some sort. A couple of I/D balls on long wire spans between poles is not a bad idea either. These costs are insignificant compared to the investment in lives and of setting up and operating these magnificent HEMS programs.
I must add that the designers have done a fantastic job on the crashworthiness of EC135 fuel system.
Best wishes Sondre, we are all pulling for you.