Ok...there are a few possibilities here. Not that I have any personal experience bear hunting, but I do have a very good friend who, between he and his sons, has 17 bears under their belts!
I look at this problem and I see two possible solutions...could be more, but for me, there are two choices:
1) I am on the opposite side of the canyon from this old bear and it is getting late in the day. If I am not mistaken, morning thermals flow uphill, while evening thermals move downhill. If the thermals are for sure moving downhill, then I would have a good chance of sneaking up to the lone pine, in my wool socks, keeping the pine between me and the bear. As long as the thermal isn't carrying my scent to the bear, and he can't hear me, I should be ok! Even if the old boy wakes up, there is a good chance that he will continue feeding on the onions and he won't notice the easy meal that is sneaking up on him! Since he is at the top of the food chain, he isn't wary like a deer or elk would be, and he will keep his nose to his grub!
While I am approaching the pine, my old Ruger Flattop 44 would be in my hand, loaded with 5 rounds of my handloads which consists of Sixshot's 250 gr Keith bullets over 18.5 grs of 2400. I can hold under 4" at 50 yards from the Keith backrest position, which I will be assuming once I get under that pine.
This is where the fun begins! My guide and backup would be our Karma host, Sixshot! He's carrying his shiny new custom 5 shot 480 built on a stainless Bisley in his worn out old chest rig that's held together with bubblegum and chicken wire. He is staying a few yards behind me with his video camera, taping the whole thing so he can send it to my next of kin should something go wrong. Once I settle into the backrest position, it's up to me to calm down and put one through the boiler of that big old bear. Couple things could happen here! At the shot the bear could stay down and out, or, like what happened when Sixshot's brother shot a bear that was uphill from their pack horses, the bear could come rolling down the hill right at me! No worries though, cause I have Sixshot, the legendary MeatHammer backing me up! Or do I?! I have a feeling that the bubblegum would get stuck on the frontsight and he won't be able to draw his gun, or he'll be having a footrace...not with the bear, with me! More than once I have heard him say "You don't have to be faster than the bear, just faster than your hunting partner!"...
Another potential problem with this approach would be, in early evening, the thermals kind of get 'goosy'. The won't change direction like an on and off switch, but might get a little swirly and our scent might get to the bears nose. If that happens, I'd be kicking horseturds all the way back to Pennsylvania!
This brings us to plan 2!
2) The bear was heading towards the blowdowns, which are to my left, when he took his nap. I will scoot to the right, and work my way up the opposite hillside behind the bear. My boots will come off so I can stalk quietly through the pineneedles and work to 50 or 60 yards of the bear directly behind him. 'But what if you have to run?'...even with my old track spikes on, I will not outrun that bear...no one could...no way! I am comfortable shooting at 50 yards from either sitting, resting my elbows on my knees or from a kneeling position. The big Keith bullet I am using is capable of penetrating from any angle, reach the vitals and still have the oomph to exit. The wind will now be in my face, carrying any scent away from the sleeping bear...once I am within my comfort zone of 50 or 60 yards, I go into position, the hammer comes back and I hope that Sixshot is getting it all on tape!
But then again, what the heck do I know about bear hunting! :wink: