In one life you can make it to the iron age and get an axe. And at this point the eve spawns are still pretty close to your camp. So the chance of an other eve to be able to come to your camp is pretty high. So it would be nice, if you can create a signal for other eves. A smoke signal in early stage of a camp could unite families 
This idea is by @Pogimon805
I did read with smoke signals you can communicate as far as 80km. idk how many tiles that would be in game 
maybe about 500 tiles?