Jim, you are the envy of most cookers with the selection of wood you have access to , your wood should be dry for the most part, I say this because when you cut your wood and store it you will have dry wood (like you buy at the store ) you can re-hydrate it in various ways (example , water, beer , ) as a competition cooker myself NO BARK ALLOWED !!! thats where the bugs and mold hide when the wood is dryed, as for size, it depends on your cooker, Remember it's easer to add than to take away, I suggest 3'' to 4'' chunks of wood for smoke ( Look at the bags they sell in stores ) dont put wet wood on your fire source, put the smoke wood to the edge of the fire and let the heat come to your wood, this will give a longer burn and smoke, you want just a light blue smoke comming from your stack not a heavy white smoke that will make your food bitter, hope this helps