Hi there,
If you moor at the NYS just make sure you put the ropes through the rings and back on to the boat. Yes, drop the mudweight and take its rope also through the ring if possible.
I have never had a problem with the noise, well lets face it, they are all going to work etc, while you are on holiday on the boat!
If you can walk from the Bishopsgate Bridge end, walk along the path to the Cathedral you will have avoided the climb up Prince Of Wales Road into the city.
Stop at the Edith Cavel, for a swift one, before a gentle walk down the hill into the main city shops and market. Most of all have a safe and enjoyable time in Norwich.
If laden on the way back, if memory serves me right, there is a Taxi Rank next to the Market on the right hand side near Tescos. If I am wrong, I am sure one of the many Norwich members will correct me.
Iain