I bounce around every five years or so. Like Johnny Cash said, "I've been everywhere, man."

No sweat on the driftwood. It really is a big risk no matter the source (exception is the manufactured stuff sold at pet stores- it's not really drift wood, but sandblasted to look like it is!).

Driftwood spends a lot of time in the water, much of it due to being buried/embedded in the mud. The Great Lakes are in particular is risky due to the heavy industry that has been there for the last 100 years or so.