Welcome Neil. First thing, please be careful filling up with water, including the loo as frost still likely and you can get expensive damage.
For maintenance it's easiest if I say what I plan to do in a month or so as I'm not having it serviced this year, it's only done about 2,000 miles..
- wash and car polish roof.
- de-grease hinge mechanism if dirty [unlikely] and re-grease with a lithium/white grease or light smear of vaseline.
- brush and vacuum pop top fabric.
- wash and Bobby Dazzler bodywork as my van has dimpled finish.
- visual inspection underneath and clean as needed, hopefully no damage.
- de-grease and clean corner steadies and re-grease.
- de-grease and clean handbrake/brake linkages and re-grease.
- pop the bung on rear of brake drums and check shoes for wear.
- clean step mechanism, do NOT grease it, it will attract dirt which will result in a grinding paste.
- ptfe spray on hinges and locks.
- wipe clean rubber seals, I use a baby wipe, and dust with talc if I can find any, if not I may use a light silicon spray
- check outside electrics - security of cable/fittings, bulbs for operation, reflectors/lenses for damage, 13 pin cable for damage and contacts
- road tyres replaced as mine will be 7 years old this summer
- check spare wheel/ tyre for ease of removal, pressure and cracks.

Colin

I forgot, drawbar grease nipples