Secret Camp in Red Dead Redemption 2

You will need to quick select Chapter 5.

Load "A kind and benevolent Despot".

And play until you meet Gloria.

You have to give the last gold bar to Gloria.

Watch Dutch in Agony.

You can't steal back a gold bar.

You will need to play until mission in factory.

Do the last task in factory.

Exit and hop over the wall (square).

After that, follow path away from the mansion.

Mark Campsite and go there.

You have to explore a secret campsite.