Not much I want to add to Andy's notes above, other than change your mindset when you go. It's the journey and not the destination, so take time to relax.
You know your car pretty well, so just do the full once over a week or so before you go and have a shakedown between then and your departure.
Anything catastrophic can be couriered within 24hrs so just follow Andy's advice & travel light.
People will always help if you're stuck or lost.
