Hi, I'm sure there will be someone here who can offer me some advice. I'm headed to the USA at Christmas on a basketball trip. I'm taking my DSLR plus batteries and have a few questions. Is it possible to take batteries in your carry-on luggage, if so how many? What size memory cards should I be looking at? (my 7D takes CF) I want to shoot basketball plus general holiday snaps, whats best idea on lenses? I have a Lowepro backpack, instead of taking a regular backpack do I take that? Given I have 3 batteries, plus flash batteries etc in there. I know when I travelled just from Tasmania to NSW many years ago I was made put batteries in my checked luggage, wondering if there's a requirement for that especially on international trips? Any help / advice I can get would be much appreciated.