The longest I've left my snakes is about a week or a week and a half.
I'm a university student, so my snakes had to stay in my apartment while I went to my parents' house for winter break. Winter break was about 4 weeks long, but I was close enough to take day trips once a week to feed and check up on my animals.
The snakes were fine. But let me tell you...I was constantly worrying over them while I was gone.
If I were in your situation I would set up a temporary tub and take your snake with you.
It will be easy since you only have one. It'll save you from worrying and potential risks from leaving your snake.
Good luck on your trip.
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