How strange. If I had spent any kind of money on all that gear I would certainly want to take it home with me. This is similar to that instance at Angle Tarn a few weeks back, where tent was dismantled and all the gear stuffed inside it, with a suitcase put on top, maybe to weight it down. My favourite theory is that the occupants of the tents were maybe busy dismantling their tent and started packing everything away neatly and the pitch was suddenly struck by the dreaded midges
and off they ran down the hill screaming, leaving everything behind. I've never left any gear, but on occasions I've started to pack up and ended up ripping the pegs out and shoving everything into the car in one big bundle when the midges started.