nsdemit,
I have NEVER hunted Bighorn sheep, however, I have hunted Dall sheep (I lived in Alaska for 17 years). From my sheep hunting experiences, I would say your mind is right on track; carry only the essentials! ...and essentials does not mean case of beer, slab of bacon....

From your post, you say your whole pack will be 32lbs. Does that include ammo, knives, first aid kit, flash mirror, radio or cell phone, meat/cape sacks, plastic trash bags (to protect you from the rain...if any) and of course a camera? The reason I ask is because I did not see any of this in the photos you provided. You may need it.

Two weeks, wow! That's a long time to be spiking it. Are you going alone? What type of terrain?

I wish you the best of luck and of course be safe!!!!!!! .....and remember...there are old sheep hunters and bold sheep hunters, but there are NO old,bold sheep hunters. NO SHEEP IS WORTH YOUR LIFE!!!