This was my setup I used when I took a trip to the Philippines and China for a while.
A hamster was one of the few pets which I didn't feel guilty to travel but only if I made it safe and comfortable for him.
Two high quality water bottles for guaranteed water, with someone visiting a few times a week and cameras to monitor online.
I ended up seeing Fluffy more on my trip than when I am at home. Because he goes to bed as soon as I get up
https://www.youtube.com/watch?v=gH5qmrDfOOY