Ignore all advice tailored to taking your cat 'on holiday'
You are not taking your cat 'on holiday'. You are moving your cat into a new home. That moves. Often.
It's an important distinction.
All the advice about moving home is relevant. You're just going to adapt it to your current circumstances.
https://kb.rspca.org.au/knowledge-base/how-can-i-help-my-cat-adjust-to-a-new-home/