about 4 hours ago - SylenThunder - Direct link
Originally posted by Licker of Windows: But the screamers spawn inside the main base.....
1. Size matters. Screamer scouts spawn X distance away from the chunk area that generated the heat that instigated the spawn.

2. There is no mechanic that prevents screamer scouts from spawning in your base. Your Land Claim Block only prevents POI sleepers, and your bedroll only prevents sleepers and random biome spawns.

3. This is how the scout mechanic currently works.
The activity level required to trigger is 25%. A single campfire burning fuel with no other activity takes over an hour to hit 25%.

Once that triggers, it then has a 20% chance to spawn a screamer.

If nothing spawns, reset activity level, and wait 4 minutes without accumulating additional activity level.

Repeat activity level build up, the 20% chance, and the 4 minute cooldowns until one spawns.

When one does spawn, wait 22 minutes for a long cooldown before starting over.
This is information straight from the devs.

As the others have stated, it really is hard to judge or give you advice with such limited information.

Originally posted by Macdallan: I have never had a screamer spawn inside any of my bases - not saying a glitch/bug won't or can't happen but I always place a land claim and a sleeping bag as those prevent spawns in a certain area. If your base is really big you might need to bump up the land claim area in your map settings.
See #2 above.