Hi Julie,
Here are my suggestions
1. Ask your surgeon to explain the pathology results to you both. If, as it appears, they consider the cancer to be contained in the prostate, and the surgical margins clear, there's a good chance that they have effected a cure. Ask the surgeon to explain what surgical margins means.
2. Ask your surgeon to explain what will happen if you get a PSA rise at any point. Ask him what this actually means if there is a PSA rise. Does this mean that OH has an incurable cancer (it doesn't). Ask him to explain salvage radiotherapy.
3. Ask your surgeon what would happen if SRT fails. What next? Ask him to explain hormone therapy.
I'd like to add more questions, but I don't know what comes next!
My father was diagnosed with local spread to seminal vesicles in 2001 age 61. He's 76, and well.
My OH had surgery age 60 in 2014, and salvage RT this year. We're still expecting a cure.
It's a very overwhelming disease in the early days. You either read everything and want to move quickly (me) or read nothing and agree with everything the doc says (OH). Your husband obviously requires information and reassurance.