I love this game. I had not found anything else as enjoyable as the TombRaider franchise until Vigor came out. It’s flippin’ brilliant. Please keep growing! Happy to contribute to suggestions so yes I agree the siren is annoying (but more so to those in the room with me who do not play the game!) but it is very relevant so not sure what could replace it - my suggestion - perhaps different less annoying warning sounds e.g randomised nature-based/rural warning sounds (Wolf, fox, owl, bear attack, tractor engine, wood-sawing etc?)
The camping issue - Maybe the threat of a mountain wolf slow damage bite if you are too long crouched in one spot - so you are still able to camp but just not for a ridiculous amount of time 🙂 Love the idea above for the shovel too.