They make a bracket for salt blocks that attach to a post or wall with a couple of nails or screws. They mount very well to trees! And a large jar of peanut butter just fits in it snuggly!
I don't even worry about human sent on these things, They will lick the jar clean in a week or less. I don't get out to check them any sooner. I use the cheapest store brand stuff, and I will be putting up another one next trip out.
The only real difference between a good tracker and a bad tracker is observation. All the same data is present for both. The rest is understanding what you are seeing.