Dear Raelene
A lot of ppl create a scrap book of photos, cards, recollections of family events and stories which add an extra dimension. My big regret when my g/father died of Alzheimer's is that I never took the opp to speak to him about his life. He had been a full colonel in ww2 and had done other amazing things. Maybe you could tape a conversation with your dad about some stuff he is proud of or things about his life you have always wondered about.
I hope the time you have left with your dad can be as peaceful and fulfilling as possible and as pain free as possible
Best wishes
GHT