Checklists sound like a good idea but then you need another of which the first item is - 'Find and read the main check list'
As an aviator you will be familiar with the 'pre-take-off walkround' best done alone and without distractions and this fits well with caravanning.
Quite a lot depends on your 'co-pilot' particularly if you 'delegate' the internal stuff - windows and rooflights closed and secured, fridge changed over, etc.
Movers are a potential problem - remembering to disengage the rollers is a very good idea, but this fits into the walk-round.
I have found the most likely cause of problems to be too many friends. I know this sounds terrible but when you leave a long-stay site e.g. in spain after Easter and 4 months on site you will be very unlucky if you don't have a fairly large group of lovely people come to see you off, help you pack, offer you a farewell drink etc. etc. What is not to like ? except in all the emotion is is very easy to get distracted and leave with a roof vent open etc.
Then, at the next convenient pull-off from the site, stop, and check everything over again in peace and quiet.
But, hey, I can/have get/got used to problems like this.
My solution is to get as near ready for departure as you can the evening before. if the pitch permits angle the van for direct hitch up, or even hitch, test lights etc. I've fitted a small on-board water tank so all we have to do is disconnect electric, plug in the car, whind the legs up, lock the van (oops change over the fridge) and go.