You're going to burn your brain out worrying about this!
How much wood are you going to use for smoking anyway? We've had some hellacious storms this last summer. Grab a bow saw and jump in your car or truck the next time there's a big storm and drive around some tree lined area. Oak, and maple are easy to find. Hickory a little less common. There is also cherry and apple to be had. Or drive out to the local orchards and see if any have apple or any other fruit trimmings.
Or buy a bag of chunks at the most convenient location and use the time saved grilling and smoking.