Personally, I would sell the 10D and go with a 30D. It is just more capable. Everything it does, it does better than the 10D except maybe give more muted reds. I find all of the colors of my 10D to be more muted than either my old 30D or my 50D.
My concern would be that I would miss a shot waiting for the 10D to process information. I know mine will sometimes pause on me while it is writing to the card. The 30D will not do that.
If I were faced with a once in a lifetime trip like this, I would probably sell my 10D and pick up something faster. If not faced with a trip like this I would probably keep the 10D. I have a 10D now as a cheap throw in the car camera. If something happens to it then so be it. Only cost me about $130 anyway.




