We have started running a small firewood business and the currant yard has some hardcore were most driving is done but this is not very flat and hard to scrape mud off. Does endless piles of wood chip bind this together over time or just make more mud? I should add this is connected to a farm so mud coming in on wheels is unavoidable.   Options 1. Keep scraping the mud off the worst bits and carry on. 2. Get a decent flat hardcore base laid and tracked in. 3. Large expanse of concrete with