I think you are most probably right. Thank you for your effort to find the place. Here is the passage in which Snakey woods is mentioned. I thought that It is somewhere near Cherry Orhchard but when I look at the map I saw those places far way from each other. So, I was confused because the characters were going out for a walk. However, as you say, Sandy Lane and Deddington Plantation really fit.
"When my first pay night came I called for her and asked: "What about a walk up Snakey Wood?" I was cheeky-daft and on top of the world, and because I'd forgotten about our arrangement I d