For camping, I'd rather use an alcohol stove. Methyl alcohol is cheap, clean burning, quick starting, and available at gas stations. Just don't drink it. The stoves themselvers are very small and don't get covered with soot.

Check out the Minibull stove videos on YouTube. http://www.youtube.com/user/minibulldesign


With woodgas you have to preheat the (wood) fuel to a certain (hot) temperature. And of course, wet wood doesn't burn very well.