I hunted that tag 2 years ago during 2nd rifle. It was tough, lots of people and 0 deer , not even a doe!
I didnt make it to castle peak but you do need to be prepared for rough weather and especially road (dirt) conditions. They can ruin your hunt, a 4 wheeler would have saved my hunt just to get around on the main roads sp I could bail off and hunt.
On the other hand the country is awesome and that is enough to get me back there someday.
Some bucks will be rutting during 3td rifle, heck the rut could be in full swing then.
Yes the deer will be at lower elevations so I would hunt more of the higher p/j/sage transition and into the aspen. The wilderness area in my opinion will be to high.
Jeff