Really great photos. Someone I know is doing a similar trip, checkout www.vanenvan.com
Just my opinion, but I think your signature is too big. Every time I look at your photos I get distracted by it.
A friend of mine gave me the same piece of advice, and I have to admit he was right. I think as long as your don't post your full res, or your RAW photos, having a simple watermark should be just fine.