I have always heard European mount myself.
burry in the ground up to the antler bases (It will speed the process tremendously if you remove the hide from the head)...be sure to put a 5 gallon bucket or something similar over the top with a weight for a few reasons....1. animals will dig-up and run off with if given the chance.
2. the sun will bleach and dry / crack the anlters if left exposed.
After a few monthes, depending on weather, bugs, etc. the head will be cleaned by nature but will remain unattractive. Now you use either a commercial agent or a homemade concoction to turn the skull white. Careful, too much bleach = flaky skull. Also, be careful when bleaching around the anlter bases. We have found submerging up to a level where the solution is below the bases, then using paper towels to wrap around the critical area. They tend to soak up the solution and keep it from ruining the bases.
The solution i use is a mixture of bleach and water which works ok for me. I have heard people making almost a paste with borax. Some use peroxide. There are also many commerially made products, but since we are saving money by doing it ourselves, does anyone have a really good proven 'whitening' solution to offer?
Also, if you are looking to have it done professionally, while i am sure it can vary, I have found prices in my area to be pretty close to $75-80.