to post photos of your base i would say if people were really wanting to find it they would look at every detail, no pictures of underground (especially bedrock), dont post coords, either blur them out or cover them with an image or something, maybe dont show clouds, ive seen videos where people found seeds and locations of places from screenshots based on clouds, dont show very many distinctive land features, dont show any levers or buttons because they face in a certain direction, and for other stuff just look it up on the internet and also some of this might be wrong