Many hotels offer traveling families a crib in the hotel room. A nice accommodation indeed, it's even nicer that they offer sheets to go with it.
However, I still like to travel with my own baby's bedding. I don't mean the entire crib set but at least the fitted sheet. I find it helps her transition to her new surroundings quickly and makes her feel at home. Plus, they are much softer than the washed up hotel sheets.