I'm not sure what you mean by "a ton of driftwood" but at one time I had my 190g decorated with nothing but driftwood. It was literally stacked front-to-back and top-to-bottom with the stuff. It was filled with a bunch of different tetras, wild silver angelfish, and a huge assortment of rare plecos.
No matter how long it soaked, over time it will still release tannins.
The tank will look great once you get "over the hump" with the heavy tannins but be advised, it will always release tannins. That is how a black water stream sustains it qualities. Weekly water changes help keep in in control once you get the majority under control.
Be patient as it is a rewarding aqua scape, it just takes some effort.
I still miss having that set up in my living room.