Its usually around clock change time he appears/disappears.
I've had 1 camera out for a couple of weeks and last night decided to check if there was still dry food in his feeding house - and as I put the lid down I heard a noise - so looked again and he was there.
I then put out his usual - water, dog food, hedgehog mix and pellets. Got him on camera scoffing it.
My little vixen has disappeared for a few days now, I think shes bedded down with her Kits, Her mate arrives every night to collect the food I put out.