Hi,
I don´t know if you worked this one out yet, but I think I have.
I came across these slaves on my first run through and found three of them quite easily, then I started to compleet the main missions and after that I the only slaves I found were sacrificed. The completionist in me said that will not do!!!!
I found 9 slaves in total. I think, I may have spoken to one twice, so there may be 10! After I found the 9th I still came across these small venatori camps, but they no longer had slaves with them. You can find the slaves in small venatori camps near fixed venatori camps, red templar camps and your own camp sites, but don´t set them up just yet!
Am now playing my third game and these are the does and dont´s:
Dont: Complete the Venatori mission!
Set up any camp. This means you only have the base camp (yes this sucks)
After you found the third slave and you can start the Hire the freed slaves mission on the war table, don´t start it until you have all of them.
If you accidentily do one of my don´ts all you´ll find are sacrificed slaves! (venatori bastards!)
Do: Complete any other mission
Scout the entire map, they are slippery bastards, they do respawn at random!
Hope this will help you out!
Enjoy!
Gwen