Originally Posted by
EESDL
both would be nice but if I had to choose then paper ……..
If you can use a laptop/windows tablet for the task, QGIS is pretty decent for mapping and printing the output. That would allow you to maintain an obstacle file for each location and plot them on any kind of underlying map you have access to, then allow you to print. It also allows for pretty easy import of external sources of data if you have access to any.
There's a bit of a learning curve to it, but it's free so there's a lot of online tutorials available.
If you want to go all digital, small number of devices and are happy to use android (and promise not to operate in North Korea or Iran!) ATAK on Android allows a really simple interface and gives you the information on a moving map as well, which is an added benefit.
If you're going to the HLS's in person, you can do a recce using ATAK on a phone then export the marked points to KML and import them into QGIS for subsequent maintenance/editing.