I never saw a PA or had my BCG or mitomycin treatments done by a nurse. In my case, the nurse did the prep (numbing gel, prep, etc.) and the urologist did the treatment. I always brought my notepad with my questions and my uro spent time with me to answer questions and I took notes on the answers (especially in the beginning).1 After I got referred to the bladder cancer specialist doctor and had my RC, he even gave me his email address and cell phone number. I never called his cell but when I would send him a question or report a concern (suspected intestinal block, suspected urinary tract infection, idea for a research study on bladder cancer) he would get back to me quickly. He's a professor at a university teaching hospital and we have great conversations when I see him. I am careful not to abuse the access I have had and he has even sent me email out of the blue now and then.
I would not be comfortable only seeing the PA for bladder cancer--but that's me.
At my GP I don't have a problem seeing his PA but he still always comes in and spends time as well.
Again, other people's mileage may vary but I want the doctor, in addition to whatever staff he/she has for various tasks, to be involved in my treatment when it comes to anything serious and in my opinion cancer is pretty darn serious.
If you are in a small town you may not have a lot of options so you may just try talking to your doctor about your comforts level and desired interactions with him and with the PA. Could be he explains things in a way that makes you more comfortable and it could be he makes some adjustments for you. Worth a shot.
Mike