RE: How long to season Smoke Wood
IMHO, it depends on the size of the rough stock wood - this determines how long it will take for the wood to dry-out enough to burn.
Logs should probably be quarter-split (split more if logs are BIG) while green and stacked for a few months.
Large Branches - I would split once, and give 2-3 months. If you get a bunch, split some and use those first - let the other stuff dry whole. The bark tends to seal-in moisture, so split wood generally dries more quickly.
Small Branches / Twigs - these are probably OK to use relatively green. A few minutes of sitting on top of / burried within lit coals, and they'll fire-dry enough to burn and lend smoke.
If you're going to stock-pile some, keep it somewhere where:
-It will get sun exposure (you don't want it in too much shade, where it will rot instead of dry)
-If it attracts rodents / snakes / assorted "little buddies", they won't become a nuisance.
A last point - depending on the part of the world that you're located in, you might want to be careful when digging-around in your wood pile. (I can imagine wasps, snakes, spiders, and other assorted critters that bite!)