Yikes Johnny!!! What a horrible spot.
Firstly, I should state I've rarely played Whistler at all, and never in unevens, so this is new territory for me.
This definitely looks like a situation where you have to cut your losses. Don't aim for the green or you'll likely get in even more trouble. You've got a severe sidehill lie which could mean needing to aim right of the bushy tree in front of you. Too dangerous in my opinion.
What happens if you turn back and face the fairway? Can you find a lie where at least you take out the left-right dots, and have something that's straight, even though it will certainly be a big downhiller. If you can, then I might try some full power wedge (probably with a lot of backspin to get it up from the downhill slope) and hope to land on the flattest part of the fairway that's available.
I fear though, that whichever way you face, it's going to be luck whether or not you can blast through the undergrowth.
I don't envy you mate... Hope you can get out of there!
BTW: looking at the scores posted so far, my guess is that a lot of players have found some serious trouble, and that anyone finding fairways and greens has a very good chance. Trouble on this course in unevens looks real nasty!
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Jimmy: Thanks for sharing your video. I concur with Cerino's comments that the aim could have been a lot further in most cases. Some of these slopes at Whistler look severe, to say the least.
One strategy I've made standard practice is to deliberately miss the ding against the slope, so with a hook lie I'll adjust the aim well to the right, but I'll also try and miss the ding a little to the right as well. I've found this helps mitigate the extremities of a slope. It's the same principle that many players use playing into a strong sidewind. In doing so, I'll also add a few yards to my shot, expecting some distance loss by missing the ding.
So, I do this on strong sidehill lies, and always when there's a wind that's also taking the ball in the same direction as the slope.
Another thing to watch for is the extra effect of a sloping lie when using your most lofted clubs. It makes sense that the increased angle/loft will help exaggerate the effect, but it's hard to make enough allowance for it. Cerino's advice about seeking the safest parts of the green makes a lot of sense, as does the strategy of waiting for your best opportunities to attack the pin. If you don't have a flat enough lie, best to be safe rather than sorry.
I commend you both for giving this a shot, and for sharing these videos/screenshots. It's all a learning process, and quite the adventure: only the brave are even trying it, so kudos to all that do!
Cheers, Corwyn