Thank you so much for your responses. Annette & laban- they did recommend PCI as a preventative measure after the cancer first went into remission, however my dad decided not to have it done. He had no issues really with the chemo, expect for feeling tired, but he hated the radiation he had received to the chest so he refused.
Joppette- great to hear that both of your experiences were good ones. My dad is 61. He'll be 62 in October of this year, so right around your mother's age.
When he was first diagnosed he said he would not do the chemo because of horror stories he had heard, so I really do believe that with enough stories of people who have been through WBR and research suggesting it is the best option he may change his mind. It seems from what I have been reading that the effects of the actual tumor spreading and growing are far worse than the WBR.