I always use bait, to find my raid victims. I leave a section of my house, unlocked, with a certain amount of goods tucked away inside, and I will track anyone that goes in and steals my stuff.
Anyways, it was just this one guy this one time, and after taking the bait, I tracked him down to his base in the nearby rocks. Turns out that he was a part of a 3-man group, and they had a system where they would remove the stairs every time they entered the base, and they would just jump out whenever they wanted to leave.
They had a collection of little bunkers littering the area, all with cupboards within them, apparently, and I ended up not being able to find a way approach the base directly, without being seen.
Now, they had a twig floor set up, extending past the rock underneath their base, with some foundations underneath, where they would place the stairs when entering, and where they would jump off of when leaving. So, I set up a pit of snare traps underneath the floor, on the foundations, and I waited until they left as a group.
I was never able to get all 3 of them huddled together at the same time, but I did get the first two as they were about to jump off, by shooting the twig foundation, and sending them to their deaths upon the snare traps below, and then I managed to throw my spear into the head of the last guy before he could react.
Dipshit did not even close the door before he died. Managed to get to the door with some gymnastics, and mowed down their fresh spawns just in time, before they managed to get the door closed again (it was a close call, though, and almost ruined the entire plan). Found a cache of C4, which I used to destroy the beds, and then the front door.
Only door that they had to get inside of the base. So I just placed my own, and blew open the interior doors later on as I got the resources, effectively making the base mine. It was cute, afterwards, because they would keep trying to bumrush me. They got me a couple of times, but were never able to take their base back before the wipe.