Im planning a walking/camping holiday in the States next year and am planning on taking my Canon 30D with me. One thing I havent worked out yet as some of the camping will be in the wilds, i.e. no electricity supply, how do I recharge the camera battery. Obviously I will take spare batteries, but are there any solutions on the marked e.g. portable solar panels, that would recharge a battery sufficiently to use in the camera ?