Everybody does it slightly different CJ
I kill mine by neck dislocation but its difficult with the big stags and you may be better using a brush handle or killing cone.
I don't bleed them, i make sure the neck is properly dislocated and the blood drains into it, never had any problems doing it this way and its a lot less mess.
I rough pluck them dry as soon as they stop flapping to get the majority of the feathers out then hang them by the feet as they are with the guts in for 7-10 days in a cool place.
my conservatory never goes much above 10C in this weather and is ideal.