Right am home and ds in bed!
We had to starve ds from the night before his op but he was allowed breast milk until about 6am. Actually this was one of the worst bits as ds loves his food and he didn't go down to theatre until about 10:30, by which time he was getting very crabby. We were in a children's hospital which had a brilliant play room and a bit of outside space with toys, and a very narrow bed by each patient bed/cot with one parent allowed to stay overnight. Poor ds tried to eat the plastic fruit in the playroom...
They didn't put any needles, catethers, lines etc into him until he was under, so he went down to theatre as normal but just in his vest. One parent was allowed to go in with him when they put him under general - I went while dh waited outside. It was pretty horrible to be honest, I had taken his favourite book to try and calm him but he struggled a lot and I had to hold him down as they held the gas mask over his face. Leaving him lying on the operating table unconscious was extremely hard but the nurses were all very kind and said everyone cries, even the dads. Think the op took about 1.5-2hrs - we came back and waited on the ward after an hour or so until they took us to recovery. He went pretty much straight back onto the ward, was a bit groggy as he was coming round, ate his own weight in biscuits (take a lot of your ds's favourite snacks!) and then seemed completely recovered! His willy was hugely swollen but it looked better than I was expecting - only upsetting thing was the blood on his vest but I guess blood is pretty unavoidable during an op. He did have a line in his foot for about 24 hours, which he found pretty annoying.
He had a catether in for 2 days, so we stayed in for 2 nights. Most people seem to have had a catether which just drained into the nappy, but ds actually had a catether bag - looked a bit sad crawling round dragging the bag after him but didn't seem to bother him! The catether coming out wasn't too pleasant but very quick. First few wees were obviously painful, but again he recovered very quickly. We kept encouraging him to drink a lot to try and dilute this urine so it wouldn't sting so much. Once he'd had a wet nappy and the surgeon had checked him out, we went home.
He was on antibiotics for a week, and painkillers (ibuprofen and calpol) for a bit longer.
My tips are - take lots of food, for yourself and ds. Take a good book for when he is asleep (although the bedside tvs were free on the children's ward). Be prepared for it to be very hard work - I couldn't leave ds for a second, I had to find a playworker to take him for 5 mins if I wanted to go to the toilet (couldn't take him in with me as there had to be someone right on top of him constantly to stop him pulling his catether out) and he took a lot of entertaining in such a limited environment. Make sure you have support and someone to relieve you. Good luck!
Sorry it's so long - hope you find something helpful amongst the waffle!