It depends on how long you're staying away from him. If it's about a week long trip don't worry about him too much. Just make sure you have a large water bowl filled up in his cage so he can be well hydrated. Also make sure the lid is tightly secure so he can't escape. Other than that, I'm sure he'll be fine. While I'm on trips the only herps I have someone take care of are my iguana and bearded dragon because they need daily care, but my snakes are great when I come home to them
If you're a little worried, you might want to try the reptile house and see if they will take care of him for you. Some places like that need deposits I think. But it's all up to you.