Just Cut off the horns with skull plates and leave it outside on the tree for 2-3 days.
The flyers and ants will take care of all the brain and meat left, cleaning the skull very well.
No smell, and after you will come home you can prepare it how you like.
My self I just let it sit in salt for 3 mo after the skull was cleaned by ants and flyers. and no smell or loose hear
I will post a photo in few minutes.
Final product after 3 mo in salt.
this is how the ants cleaned the skull. No smell, no loose skin or droping furr.
I have another skull on my back yard at cleaning hang up on tree. In 2-3 days will be cleaned and then I have to placed on one bag with salt for 3 mo.