Jim,
UC Davis is good. They have great bladder cancer docs there. The ultrasound in April doesn't really mean anything since they weren't looking for anything in the bladder. That is, unless you have a copy of the scan and it covered the bladder and shows that nothing is there.
Glad you going to the right place to get treatment. It makes sense for them to get a good look before cutting things out.
Hang in there. Likely, your wife may be more in a panic than you so be sure to stick together and watch each others back!
Mike