I think you need a sensible perspective when assessing these risks.
There were some headline media figures earlier in the year pointing out that if you have RT for PCa you are 60% more likely to subsequently develop bladder cancer. However when you examine the figures, men who don't have RT have something like a 0.9% chance of bladder cancer, men who have had RT have something like a 1.4% chance. Now it is true that 1.4% is a 60% increase on 0.9%, but it is still a pretty minimal number.
The way I look at it is that I am 64, so I have got a pretty good chance, perhaps 50% of dying of something in the next 10-15 years, unless I break records I have a 100% chance of dying of something in the next 20-30 years, and having had RT twice I still have a 98% chance of that death being of something other than radiation induced bladder cancer.
All of us with prostate cancer are at that stage of life when we have already lived most of our lives, we have eaten most of the meals we will ever eat, drank most of the wine we will ever drink and loved most of the women we will ever love. So put your worries behind you, the end is in sight, but there is still a bit more time left to wine and dine with the one you love.