Kit obviously changes to fit what I'm planning on photographing that day, here is my starting point
Nikon D750, attached with 24-70mm f2.8 lens, alongside 16-35mm f4 and 80-200mm f2.8
Lee filters for these long exposures and a CPL
Rain cover for camera and bag, cloth
SD cards in a waterproof case
Wireless shutter release trigger
Binoculars and compass
Torch with UV light (reflective tape shines brilliantly under it!) and a head torch with red light
Spare batteries for everything (old 35mm film case is surprisingly handy for AAA's)
I will usually carry one of two tripods - either Slik Pro-330DX with 3 Legged Thing Airhed Neo Ball Head, or a generic mini tripod if I'm not planning on using it too much that day (or just want a lighter kit)
As is often true in the UK, tea makes things better. I usually carry a flask with me, especially if it is going to be cold or I know I'm going to be spending a lot of time standing still. It's very nice to just have a cuppa while photographing a sunrise of sunset, I'll usually add some snacks or a sandwich as well
Everything fits nicely into MindShift Gear Backlight 18L which, although not perfect, is getting very close to it. A jacket will usually by tied in one of the straps if I'm not wearing it already
If I'm taking only the drone out, I'll usually carry a lighter kit
If I'm just taking the drone out, I'll usually carry a smaller kit
DJI Mini 2, remote
Since there's still a bit of room in the bag, I usually carry my Nikon CoolPix P7100, It's pretty dated but does the job and I got some great shots with it
Cloth and spares for the drone
Shoulder bag is a Lowepro Mini Mag DLX, which I got 2nd hand from a friend and mentor. Even after all this bag has been through, to me it is irreplaceable and is also my go-to bag for most of my travels