If you're really worried about it, you could always ask your hotel if you can send yourself an over-night package in advance (via the postal service, and not via courier). Put all of your batteries, wires, connectors, maybe the keyboard and GPS, into the package, maybe even some of your other stuff (since some airlines are charging for luggage these days).

You'll still have to do a customs declaration on the stuff, but at least you don't have to go through the inspection stuff at the airport.