<human>: My dad had his prostate removed a little over a month ago, because a tumor had taken over 75% of it. He has started hormone therapy and will be starting chemo early June and radiation (I forget when for that one).    

  
I am terrified on how to broach the subjects of "what ifs" about treatment not being enough... it's high grade, and grew quickly.  
  
I am seeing him in 5 days (he lives on the east coast, I live on the west coast) and I don't know if it's appropriate or not to bring up the subject of "how should we handle everything if this doesn't work" and "how can I help you from so far away" and such. He needs me to be strong, as he's trying so very hard to be strong but I know he's terrified and has been having panic attacks and so much pain and unable to concentrate on anything else to relax.  
    

I was thinking of taking him to a craft store or electronic store, to maybe get him some puzzles/3D puzzles to work on, or get a soldering iron and some stuff to make some cool stuff on circuit boards with LED lights. He needs hobbies, so I'm definitely going to be helping him find some while I visit for a few days.  
  
But, this will be the last time I see him before his big treatments start.. should I wait on discussing the scary parts? Or should this be done now before the chemo/radiation make him unable to be fully-present?
   

My brother just visited him and I asked if he had that talk. He said he had not, because "he'll be fine" and I told him "you don't know that." His answer "He will." I feel like he's in denial and being avoidant and I need to be there for my dad no matter what, as he's been the number one person in my life, and it is my turn to be there for him, but I don't want to make things worse.

Can you summarize the given text in a few sentences?
<bot>: Visiting my dad this weekend who will soon be going through all the treatment for cancer. Do we discuss the "what ifs" of treatment not being strong enough?