It can be difficult to do without a carrycot or travel cot... If you are travelling by car, this will probably not be a problem, but if you have decided to go by train or plane, it will be a bit more complicated! In this case, organise in advance and hire or borrow what you need at your destination: most hotels can provide cots, and there are many baby equipment hire services.
Other essentials for a good night's sleep include a lightweight sleeping bag, depending on where you are going, a cuddly toy if your baby has one, and some dummy soothers.