Blair, God Bless you your family during this time.
You are very lucky though. You spent many hours with your father doing something you both enjoyed. We never know when our, or the our loved ones, time will come. I remember in the mid-nineties when I was trying to accomplish some things, started making some decent money and my son being able to do things with us and for himself. My father still worked, played golf and fished. I had planned to finish a 9 year project and then spend some time doing the things he loved so I could spend some real time with him. Prior to that, and when I was younger, I hardly spent any time with my father as he worked shift work and was seldom off on weekends. It was going to be different soon.
In July of '97 I had my second son, my project was complete and sold, and I was ready to move forward with what I had planned. Spend time with him. However, months go by quickly and with a new born you have extra chores. In November '97, my father was diagnosed with cancer and in April '98 it took him. It is now August 2010. I still miss him, wish I could talk to him about things that happen in my life, and wish I would have spent time with him instead of my project.
I didn't mean to steal your thunder Blair. I typed all of that to help others realize that we all plan to take time to do certain things, like spend time with our parents and grandparents. Heck, even our kids. The only problem is that planning and doing are two totally different things and before you know it, they're gone. I applaud you for spending time with your father and he with you. You can always remember those times you had together.