I've
hunted 16C twice the last 5 years (1st rifle on my own tag in 2016 and 2nd rifle with a buddy last year). IMO - as quoted above - it's 'rugged' (rocky, steep in places, lots of sidehilling and canyon maneuvering, etc), but the total elevation gain in the unit is pretty mild by a lot of elk country measures.
Work on hiking broken terrain and general cardio in the gear you'll use on the trip.
And pray for a better moisture year. It was rough last year. Before we showed up for the 2nd rifle hunt, they hadn't received measurable precipitation in 71 days. It finally snowed 6" the 2nd to last night, but water was tough to come by and the elk were scattered.