Obviously, put that relay node on a hill, on some structure where you don't live. Or maybe on the roof of your tall apartment building, among all the satellite dishes and their associated boxes. Pretend to be one of those.

If it's a self-contained, solar-powered node, it needs not be next to you, or to anyone. It should be safe and secure, to be of use during a natural disaster, or an outburst of violence.

Until you actually need to use it. You need to get the data you want to transmit over to it. Where you'll either have another transmitter at your location. A cable snaking back to your location. Or a directional antenna pointed at your location.

Unless you plan to manually go up the hill with a flash drive each time.

Any licensed wireless networking gear is going to operate in very specific frequencies. The government requires it! If we were going for "the best" gear for avoiding detection you would have frequency hopping with jumps far enough apart that a listener has a harder time pinpointing a transmitter. Making repeaters roving makes it even harder for your adversary.

The same government can trivially make these frequencies completely unusable by just blasting noise across all the ISM frequency bands. As far as I read, it is already happening in Russia, making LoRA anything but long-range...

If the place you are at is at that point in the conflict, RF scanners are the least of your worries.

Semtech LoRa Modems are wide frequency range modems. Latest generation also supports (non-LoRa) frequency hopping.

The signals are difficult to spot once you are in some distance to the transmitter.