Sounds like a rut hole, if there are numerous and different fresh and old rubs over a large number of trees. These are top secret areas for bucks. It should be top secret for you too if it turns out to be a true rut hole. Tell no one of it's location.
I'd probably stay on the periphery (rather than stink up the place with human scent) and glass with the expectation that bucks will be coming through there occasionally and leaving some scent/rubs. Occasional grunting or rattling wouldn't be a terrible idea. I've read about rut holes but never seen a good explanation for their existence. Apparently, it's kind of a man cave for deer, and for sure, the best bucks around will be coming and going if it is a true rut hole. They may push a doe into an area like this and breed them there. There's not many stories about hunting these type spots so you're on your own to figure it out. Watch your wind.
Doe in estrus scent has never worked for me, but I've seen plenty of positive reports by hunters using it. I don't know if it is appropriate for your situation there though.