As long as you don’t have anything pointy or suspicious-looking in your carry-ons (I think you’re now limited to 1 lighter, max), then I would suggest the carry-on method.
If baggage handlers do search your bag contents, I believe that they are required to leave a card in your baggage, to inform you of the search. I’ve found a few cards before in my own baggage - with explanations of how they are not responsible for replacing anything they break, etc. That’s also something you may want to keep in mind as well. Items that can break and are crucial to the hike (what isn’t, I know) may be better off being mailed ahead.
Good luck!
bearbait