One thing I've noticed in Northern VA is that the majority of rubs are on trees like pines, cedars, maples, and cherries. Why do bucks prefer these trees to red/white oaks, hickory, etc.? Is it b/c some of them are a little softer or does it have to do w/ what the tree smells like, like pine and cedar for example? I first started noticing these rubs about 2 weeks ago around the area. What's the best way to set up on a rubline?