My problem when I go on vacation is I have no one to change water or clean cages, just someone who is willing to check temps and make sure no freak elec outages or equip. breakdowns.
I am usually gone about from sat. to sat. so all I can do is fill up the water bowls and hope for the best. I usually don't feed the week before I leave that way I am home to clean up any soils in the cage from the last feeding before I leave and usually my snakes seem to drink alot after feeding and not so much later in the week.

Just like they can go w/o food for a couple of weeks they can go w/o water for a short spell also. I had a rescue female that as a juvie went w/o out food and water for over 4 mos in a cold trailer in upstate NY in a 30 gal tank w/ an adult bp. Both made it and I know the female is doing great and actually breeding. Not saying tis ok to leave w/o water just saying they are built to get by for short spells.

I do worry about them as if I had left my child home w/ a sitter