I had PLND (Pelvic Lymph Node Dissection), which is a proper operation, a week in hospital procedure, back in 2008, and with the associated post op infections, I ended up with a catheter for a couple of weeks but made it through TWOC OK
I had a template biopsy back in November 2014, and didn't have too many problems, but driving myself home to Norfolk the day after was fun, 5 toilet stops in 100 miles!
I then had HDR Brachytherapy in February 2015, which involves reinserting the template etc, I was OK for the first few weeks, but then another infection caused me a bit of grief, so I was on Tamsulosin for 12 months.
But I stopped taking Tamsulosin last July, I can now manage quite well, for example I went with my son-in-law to see Sheffield United play at Peterborough, I had 2 pints of Guinness in the pub pre match, I was then able to stand in the terrace throughout the first half, and then queue for ten minutes at half time waiting to get into the Gents, so I think it is fair to say my continence has made a full recovery?
So long term you should be OK?