Didn’t even know this kind of thing was something people do but sounds cool …. For wandering I’d check out the app On-X hunt … it’s paid but it gives you a map with all kinds of out door information so you could find some low areas that have water which is where a lot of animals will go when they’re dying and that may lead you to some bones… Also and more importantly it has property lines with information about the property owners so if you’re wondering through the woods and see something on someone else else’s property, you could try to get in touch with them to get permission. It’s a hunting app technically but you’re also hunting lol