I'm planning to lead slaves back to their owners' plantations.
Why would you want to take slaves back to a plantation?
I want to send them some place better.
It is wrong and immoral to consider enslaving people. Instead, you should encourage people to be hard working and productive on their own.
It's not like I'm going to put them in a oven to roast. I just want them to be free and better off.
Your idea of freedom is bizarre. You do not own anyone so you have no right to snatch someone's freedom away. Focus on doing something productive rather thinking of enslaving people.