Waterfall waterbowls are used pretty often in petshops when they are closed over the holidays they allow the bowl to fill up when its been empty, rather like a birds waterbowl, there not that expensive, the only problem would be fresh water, the water would be still for your whole time of holiday therefor the water will not be very good for your snake, maybe you have a local petstore that will look after him? i know the place i got Damien from does holiday petcare, they ask for a small donation and the price of food for your snake, not sure if your local petshop does this but its worth asking : )