Never salt a hide that is going to be mounted unless you know how to split lips,eyelids and nostrils,plus turn the ears inside and completely flesh the lifesize skin or cape just like the taxidermist does.The salt will do no good on those detail areas and they may spoil.If they don't,the salting will draw up and shrivel the hide,making it a pain for the taxidermist ti split and turn these parts.
If you aren't trained to do these things,don't salt a skin to be mounted.It will save you a cussing by the taxidermist and it will probably save your skin.
Never,ever salt a skin and freeze it.Salt prevents freezing and draws a lot of fluid out of the hide.While it is not freezing,it will swim in it's own juices and most of these hides slip.It is OK to freeze a dried,salted hide but what is the point?
It would be OK to salt a hide without head or feet but you should get all the fat and the heavy meat off first.It can be dried-but not in the sun or by a heat source.Just dried in the shade.Don't freeze.
If you have a cape or lifesize skin for mounting,Skin it but leave any details you are unsure about like head,lower legs and feet,for the taxidermist.First choice would be to freeze it or at least refrigerate and get it to a taxidermist as soon as possible.
A hide hair slips because it spoils.Don't let it spoil.It is that simple.Meat will spoil.A hide will spoil.Keep it as fresh as you can.You may age meat but you don't want to age a cape.If it spoils,you will pay for it anyway.Keep it fesh.
If it is important to you,get it off the carcass and don't procrastinate,regardless of how tired you are.Get it off and get it cool.
Ideally,you should pick a taxidermist you have faith in and ask him how to handle it.He will be glad to take a few minutes to explain to someone who cares enough to ask before hand.This benefits both of you.Good hunting.