I tend to use the fx soundboard from adafruit and trigger things from momentary push button switches. The more common approach has been to wire in tactile switches in to the glove finger tips or use an accelerometer or mercury switch to trigger sounds based on specific movements.
I am currently redoing the left portion of my backpack to more closely resemble the avp:r pack. Unfortunately lowering weight and screen accuracy seems to be mutually exclusive when you have to sculpt and form with bondo and resin.