About two years ago a similar thing happened to me when I was out on Dartmoor in the middle of April, I was wild camping for two nights on my first stop over all seemed fine, set up camp late around dusk, at around 22:00hrs. I could see torches flashing around in the dark and coming my way at around 50-60metres away they stopped and seemed to settle down, not knowing who they were I was also alone and felt as though anything could happen so I stayed put for a while and slowly and quietly packed up and moved out into a nearby woodland area which I knew well, the next day I was going back the way I came to find that traps had been laid, so I reacon they were poachers so I'm glad I moved out when I did, got to admit I was quite nervous when I was moving out under the cover of darkness just in case they had seen me and maybe thought I was spying on them......