You can get a Taylor probe thermometer, just as good as a Polder (some would say better) at Target for about $17.
Barbeques Galore in Dublin will have oak, hickory, cherry, apple, pecan, and alder wood chunks in bags just the right size for use with the WSM. 4978 Dublin Blvd., (925) 556-0678. Looks like it's about 17 miles from San Leandro.