Your dad is in my prayers. You post brought a lot of raw emotions for me. I am guilty of not taking my dad fishing and impatience with him. I was to busy doing business and not being a son. On a yard stick, my measurement for my son skills to my dad would not be measurable. Not proud of these memories. I agree with Ragfly, take your dad and kids fishing as much as you can. Oh and don't forget your better half. They deserve fun together times also. There will be a day that you can't and then you will have years of regrets, just like me and others.
My your dad beat this challege.
Chuck
From Steve Wunderele - 10-2-84 --"A fishing trip maybe brief, but it's memories are endless."