Hey my friend, I hope you have a great trip and sounds amazing! I think your approach is respectful and also sustainable. Being thankful to the fish for giving its life so you can eat is the right way to go about harvesting a catch. I also release nearly all fish I catch as it is the hunt, thrill and journey that make fishing fun. Native, wild trout are a delicate fish so you barbless hooks will really help when they are released... look forwards to seeing the pictures from the trip!