I'm praying that father get's into the facility that is closer to you, so you will be able to visit him more often. It's so important to do that. My heart really went out to the people at my mom's facility that were pretty much ignored by their family.
My mother passed last November from Alzheimers. For a very long time, I still came to see her even though she didn't know who I was, simply because she was delighted to have a visitor. And for me, this was a 3 hour trip one way. I finally stopped when I didn't see any reaction at all in her eyes.
We dealt with losing my grandmother in slow degrees as well. At first she was just really forgetful, and became more argumentative than she ever had been before. Then she started acting irrationally, and we felt she could no longer live alone (she did not agree, of course). She was forced to move to her (younger) sister's house by some of my relatives and we were all very unhappy about how it came about, she didn't get to say goodbye to anything, they tricked her and dumped her dog on me. She was very upset about the dog (first dog that I found a home for) and about her house, which she loved.
She was finally put in nursing care about a year later because she was incontinent and not very apologetic about it. Even though I had animosity for her sister and how they had handled things, I did not disagree when she went into nursing care. My mom made sure that the nursing home was closer to OUR houses, because we went to visit her and she had worn out her welcome with her sister.
She was there five years and over that time she slowly "forgot" who we were. She was sure my youngest son was my older daughter, and it hurt my daughter's feelings when we pointed out who the baby was and who the 14-year old girl was, but Grandma just would NOT believe that was her. She stopped recognizing us finally and it became too hard to visit, she was just belligerent with everyone. We did get a giggle from her when she eventually stopped drinking any fluids, and the only thing she would drink was "near beer"....she had been a big beer drinker all her life and she really enjoyed those fake beers my mom brought her. But she didn't remember my mom, or any of us. Only that beer tastes good.
When she passed it was kind of anti-climactic. Grandma had been "gone" for a long time. I know if this happens with my mother (who is extremely sharp at age 85), I will keep her at my home, or my siblings and I will trade off caring for her, as long as possible. We would really like to see her go into an assisted living situation with her significant other, I think the two of them would be safer that way, but she, just like my grandma, will not leave her home.