Boots that you know are comfortable and rugged with socks you know fit well with them. I've hunted a wilderness area in ID the last 6 seasons and the terrain is very steep and very jagged. You want serious soles to handle the sharp rocks and really good ankle support for both side hilling and when walking on uneven rocks. One guy in camp broke his leg last year while goat hunting.
On that note have a way to contact your air service in case of emergency.
Have fun!