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Cool shots here, and it's definitely great to hear about your adventure. It sounds both fun and thrilling. You really got some great take aways here from the trip. For me, the only one that doesn't really speak to me is #5. It sounds like that might have been the craziest location where you were really invested emotionally, but it doesn't quite stack up with the other 4.
Now, my favorite is #2. I really like how you worked the darks in this shot. Because it was wet out, it looks that the edges are reflecting light, which still gives definition to the rocks and such even when the actual detail of the rocks is lost due to the darkness of them. It works very well, and is very effective. It's also a great example of when letting parts of the sky blow out does work. Great job with that one.
After that, I would say #1, then #4 and then finally #3. But they all stand on their own, and I can't really see anything to suggest to do different.