Agreed Ken, very little that is vital at this time of year except maintain watering.
Some things I try to do over winter are:
Water as needed. Pots are still drying out here in the lovely sunny northeast Vic. autumn days.
Clean up fallen leaves after they drop. (less room for pests and diseases to overwinter in a clean area)
Check for pests hiding amongst the twigs and branches (scale and aphids overwinter on the trees)
Rake off any compacted, hard areas of surface soil so the mix can breathe more easily. (organic ferts and moss growth breaks down soil particles and leaves a layer of fines that can impede water and air movement)
When leaves have fallen check branch structure to decide where to prune, thin out crowded areas, etc
Wiring to tweak the shape or improve structure.
For your purposes Paddles just get him to water as needed and keep the area tidy. Everything else will wait until late winter, early spring.
I've been hoping to visit one day but don't seem to be travelling downriver very often at the moment. Will catch up one day
Hope the eyes come good.