Search the names in entitygroups.xml and either comment them out or replace with
nothing like the above entitiesclasses.xml.
You want selective entity spawining so this would be the the most efficient way.
Alternative: If you wanted to turn it into more of a natural wildlife adventure, but still have
poi sleepers. In entitygroups edit out the entities you don't need. Go to etityspawns.xml
and comment out all of the lines that have zombies. Example:
<spawn id="dz01" maxcount="1" respawndelay="2.9" time="Day"
entitygroup="ZombiesAll" notags="commercial,industrial,downtown" />
<spawn id="nz01" maxcount="1" respawndelay="3.1" time="Night"
entitygroup="ZombiesNight" notags="commercial,industrial,downtown" />
Basically any of the lines that have zombies like above, for each biome then save. Then adjust
the spawn rates for the lines that have game and animal in them. then save.
En-total that would render no zombies walking around, but you would have animals in the world,
and you would face zombies when you do Pois. Using this template gives a lot of potential combinations.
Note: if you turn off walkers, that is only during regular days, horde is another matter.
There you would have to use the first set of instructions pick the names of the zombies and creatures you
removed from the groups and replace them with nothing, then you could have the walkers and animals
that you prefer, and on hordenight the zombies you prefer. And in pois you would still have the acceleated
danger depending on tier.
Anything more and you will need to deep dive into editing the files.