Decide in advance how you are going to get to your destination. Leave plenty of time to get there, particularly if you have to arrive at a certain time for your booking.
If you are travelling by car, have it fully fuelled the day before. Plan the route and check before you go for any roadworks, accidents, etc. Depending on how long the journey is, when travelling with children it is good to know where you can stop along the way for toilet breaks! Don’t forget to plan for parking at your destination too – is there some on-site, or will you need to find street parking nearby? Is it possible to book in advance?
If you are travelling by public transport, know the train/bus/tram times and check for any planned works in advance. If there are several people travelling together, do book tickets in advance as it can often save money and ensure you are seated together.
With a little bit of planning and preparation, you can be guaranteed a fantastic family day out, making memories and having fun!