I have a hard case for the P3 and all my accessories - and I'm happy with it - but it definitively exceeds the size limitations for a carry on. I'm trying to decide which option is the best: 1. Buy a case/backpack/whatever specifically for airline travel. 2. Protect the P3 & RC with bubble-wrap or something inside the hard case and check it. From what I have read here, the biggest risk to checking the case is the TSA unpacking and being unable to properly re-pack the case during an inspection. But how big of a problem has this been in reality? On the other hand, if there's a reasonably priced option for the overhead bin, that could be money well spent for peace of mind. Opinions?