uvs for inflating objects (balloons etc)

amoeba

I'm wondering about the best way to minimize stretching on objects that inflate/deflate like balloons or a bladder on a frog.

Am I correct in the assumption that unwrapping the object in a mid-pose between the deflated/inflated state would be the best method or are there some other tricks people use?

poopipe

I'd UV it fully inflated myself.  That way it can only get less stretchy