I'm still looking for a lowepro rucksack/bag I can take onto planes and fill with my SLR and none camera gear, this new 1 bag rule is a right pain! Which one did you go for Ewan?
Tell me about it!! - I fly all over the world as part of my job (boarded over 30 planes this year so far!)
To make matters worse I have to keep my laptop with me which makes an additional camera bag an impossibility.
My solution? I take my stuff out of the lowepro and pack the bag in my suitcase. Then I put all my camera stuff in this:
Peli case 1510
Filled with the pick and pluck foam there's room for my camera body - 70-300 IS, 100mm Macro, 20-22mm, 17-70mm, 18-55mm plus charger CF cards, remote etc.
I just check this in with my suitcase (get it x-rayed at the outsize baggage desk when you check in).
I got it back once with a big dirty footprint on it where a baggage handler has stood on it to reach something, but all was fine inside!
You can get larger cases if you have more kit - but the advantage of the 1510 is that it will fit in an overhead luggage bin on most planes (if it's your only bag). Plus you can wheel it around. If you're getting locks - don't forget to buy
TSA approved locks or the Department for Homeland Paranoia will cut them off with bolt cutters if you visit the US (they have keys for the TSA locks.)