Do you have any advice for potential travellers?
Don’t worry too much about weight limits within reason. My hand luggage was weighed at Heathrow (Too heavy had to repack) but after that it wasn’t weighed at all. Take the equipment you feel you need to take the best photos.
Take a small tripod for shooting the Milky Way - just don’t take it in the vehicle.
Using big lenses requires flexibility - you often have to cram into small areas to get good shots (I’m 6ft 3 and a big build - this was at times tough to do) so consider taking a smaller lens - maybe the 100-400 Mk II.
Take a good wide angle lens - it’s vital, and a good polariser too.
The laundry in camp is brilliant - it was easy to survive on 1 change of clothes - be warned though - it’s very cold at 5am in the morning - a wind proof jacket was very useful.
Take a small laptop to edit your photos on - this allows you to get the best out of Paul’s Clinic - and ask questions - they’re only opinions at the end of the day, some will help you get better, others you’ll disagree with and discard.