Originally Posted by Edward M. Grant
Unless your vehicle has power outlets, odds are your tablet battery will be flat well before you reach your destination. An e-reader, on the other hand, can probably handle the travel and a week's vacation before it needs charging.
I take my ereader away with me every holiday with no need to recharge. I have to recharge my tablet every day when it is being used.
But a one hour train/bus ride ought not to create significant drain on a tablets battery life. Personally, like a good number of people, they might find the tablet weight being the main issue. I would hate to have to hold my iPad2 in a reading position for an hour, a feat most easily achieved with a ereader.