Wintersun Cabin & Caravan Park

We booked a powered site a few weeks before our trip as we knew it would be a busy time, and they cancelled our booking. They were receiving lots of enquiries, so they called us to check whether we were still coming. We were out of mobile range so they left a message saying that if we were not there by 6pm our site would be sold. Arrived at 6 and it was sold. Totally unreasonable in my view, as 6pm is not late and the distances out there are huge.