I know how the slaver accompaniment works; My problem is, bugs almost always arise out of their existence, even just trying to get rid of them seems to cause inevitable problems and bugs. I think it's supposedly possible to get rid of them both at the same time with no problems if they both get disaster on an assignment together, but even with that there's room for error if one of them makes it out or if after disappearing returning later without the other, which I presume will cause the same old bugs (Like the one under control refusing to be dismissed, enslaved, being ineligible for betrayal through whores for the whoremakers, etc.)
I will try your suggestion for the first, never tried letting all slavers return at once to balance it out. I generally have all my slaves fully obedient when possible, but it does seem unreasonable with full upgrade on slave pit guarding that two untrained slaves can make it impossible to have less than three slaves present at the campsite. I suppose I can get used to that however.