The diff resources did freak me out initially and I rushed into buying a couple of Stone plots to cover myself - just incase the values end up being insanely diff (my tract is 70-30 grain-wood). But I heard in Mavs the res are just placeholders so yeah hold!
I'm lucky I've got a dozen individual plots outside of the tract to trade if needs be.
When my grandpa bought his tract it came with a one acre 'woodlot' down the road.