I'm not talking about legendary gold caches, but some village/towns people's caches that they hid during the civil war or great depression. I have been pondering this for a while. I guess what I should ask is, is there a method to getting good at cache hunting? For the people that have been successful, what's your strategy?
You will spend 99% of your time doing research, not hunting. You have to look through every scrap of information available from your town's history. The truth is that lots (if not most) people had a cache of some sort. Most were small savings from selling extra eggs and such. Most were not buried, just hidden inside the house or outbuilding (out of sight was hidden enough). Most were recovered.
So you have to look for sets of clues.
1) someone who would have had extra money to hide
2) someone who died suddenly, so they couldnt recover it
3) someone without family who would know its location
4) some place that still exists today.
Research is more about finding reasons NOT to hunt for a cache. If you should happen to find a person who meets all the criteria, then you need to try to research the person. Absolutely anything written about them could help. hobbies, likes, dislikes, land holdings.... everything.
Years ago I knew someone who dated a bookie's daughter. She told him about her dad hiding money and having land he owned where he hid it. Now, if I had been smart I would have made a record of that. If the bookie died suddenly and the land was sold off, there could still be caches there. It would be a simple matter of finding land owned then tracking modern owners and trying for permission to hunt.