Travel advice!

I'm going home for Easter on Friday and realistically there isn't anyone to look after my two chins so I just wanted to know if people think it will be okay to take them with me? It's a three hour journey, and they haven't travelled anywhere in their travel box before. I would be staying at home for about three weeks.

They are generally pretty chilled but I just want to make sure the journey will be okay for them. I know that they need to be kept cool but what do I do about giving them food and water during the trip?

Any advice would be great!