Here is a technique I used on a nice 8pt I bagged a couple of years ago. depending on what type of facilites you have it may not be applicable to you.

I put the skull in a five gallon bucket full of water. Didnt skin or remove any of the meat. Used a 2X4 to keep the antlers elevated and out of the water and ensure that most of the skull remained below the water line. I placed the bucket ( and skull) inside an old dog crate that was under a shed at my father farm. Note that the shed is not near an area where smell is a concern. I checked the bucket every few months and refilled the bucket. After about six months the skull was almost completly devoid of any flesh. However it was somewhat discolored. I simply sprayed it off with a hose and scrubbed with an old toothbrush to remove any small scraps of flesh, then put in a shallow alluminum pan and poured bleach over the skull whenever I though about it for a couple of days. the skull now hangs over my fireplace on an old board as it has for the last 18 months. It is sparkling white and has never given off any odor.

I was somewhat worried that mice or other rodents would find the rack and chew on it but had no problems. I think if I hadent used the dog crate some sort of animal would have carried the skull off.

Another technique I used once on a bear skull was to simply bury it in some loose topsoil.