Harley,
Go to Yakima Training Center on Facebook. A current set of rules are posted. We had a great time hunting the area and went 3 for 3 on deer.
Our best luck came after they opened up two of the areas that were closed for the entire season. The last two days for #10 and #11 opened and the bucks were everywhere. They will close some areas other than permanent live fire areas according to the level of military use surrounding them. We found that the animals bedded on the sides of the coolies in the thick sage. We talked to the wildlife officer when he checked our animals. He said that cover is most important over food and water so concentrate on that. Get all your paperwork done early and best of luck on your sons hunt.
PS: during the 3 years, we became friends with the Manager of the range. He was very helpful letting us know where the animals were being seen. Also, keep an eye on the log book. It will tell you where the kills are.