Used to get beautiful fallow and muntjac deer in my last garden. But it's true about the ticks. And here in Norfolk UK (and other regions) the ticks carry Lyme disease, a nasty job which can cause long-term health problems. I've read that you can attach rags to trees, bushes etc around the garden. These rags should be weed on by a man before attaching. The theory is that the smell is a powerful pheramone of male aggression and wards them away. Trouble was, I didn't have a man in those days, and was loth to ask the vicar or neighbour's husband!