Hi Scotty,
I'm a little curious: what is your present staging data? I'm a little surprised, I guess, to hear you going to BCG after having had 5 tumors removed and 3 rounds of chemo. I hope that means you have had low grade tumors and highly aggressive doctors.
As for BCG, I'm 54, just completed my first 6x set of tx with it, and had absolutely no symptoms. No pain during instillation (although some discomfort as the catheter insertion made its way past the prostate), no difficulty retaining the material for two hours, no pain afterward, no tiredness, no fever; no irregularities at all at any point over the 6 weeks. I actually was a little concerned about that, and asked my nurse if the lack of symptoms meant the immunotherapy wasn't having the intended effect on my immune system, but she explained that most people actually don't get any symptoms. So, while I would be prepared for them, I wouldn't be too worried about them, as you have noted from (most of) the other posts here, and I wouldn't set your expectations from the immunotherapy based on your experience with chemo.
Good luck, and please do keep us updated.