We have been away a couple of times, DD is still small enough for a basinette so we take that. But i will start taking a travel cot when she is bigger. Maybe some places hire them, but i dont think it is a standard thing, i would hate to get caught out!
You could always phone ahead and see if where you were headed had one for hire.

ETA- i also guess it depends on where you stay. We camp alot so need to take something!