If you want your servos to survive crashes the best you're going to want to opt for steering servos out of monster trucks. Those servos are all but designed for it, seeing as monster trucks are designed to land from heights that would turn an airplane into confetti. I mean...would you drop your plane from 12 feet in the air on it's nose and expect it to run afterward? Because a good MT will bounce right back from such a hit. literally.

Don't bother with a servo saver though. I can tell you first-hand they don't protect servos very well. I've broken three or four servos despite the servo saver in my monster truck. Also they open you up for flutter, and by the sounds of it you don't need any additional help crashing.