we learnt that it is assur for a woman to shave her head if it is not her minhag and her husband will be turned off by it. as far as shaven heads helping survivors. sadly most of those killed had their heads shaven too in the deaTH AND WORK CAMPS HEADS WERE SHAvEN BY THE NAZIS, TO FIGHT THE LICE EPIDEMIC.
THAT BEING SAID IT IS A DILEMMA BECAUSE YOU RESPECT THE WORD OF THE TZADDIK. I DONT KNOW WHAt you should do. have your husband ask his rov?