Ask on the Bearbones forums, Ianfitz is the route’s creator, not sure if he posts on here or not.
Overnight spots? Can you see any house lights from where you want to stop? If not then you are unlikely to be noticed. Move away from the bridleway/track and even someone travelling along it is not going to notice you. Pitch up late, get away early and no-one will know you’ve been there. Advertising “good” spots is only likely to draw attention to them and cause problems down the line, not that I know of any specific ones in the Peak.
Good luck – I’m looking at doing the group start later this year.