Ah ok have you tried Haysden Country Park? I went up there recently to get photos of the 6 Arches Railway Bridge and flew around the bridge and Haysden lake. Was a lovely area. Just to be clear though I don’t know if you need special permissions. I just went up there at Sunset and flew around for around an hour. Only saw a couple of dog walkers while I was there. Heres a link to some of the photos I took.