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It's tough (but fun!) getting ready. We're 9 days out and I'm laying things out now, will finish over the weekend. I really wish I took a pic of how I carried everything last year. The 600 was a bit too wide for the carry on with the pelican insert, so that went in the Lowepro lenstrekker. The rest of the optics went in the carry on. The lens trekker is carry on legal (at least the older one is), but it's too large to be considered a personal item. That said, since we're both allowed one carry on and one personal item on United, I'll claim the carry on and my wife's smaller backpack while she claims the lens trekker and her purse. If I can fit it all, I'll use the same gear as last year, but I'm trying to squeeze in a 300/2.8 for low light conditions.