A deep cycle battery is better for trailers, caravans and camping.
1. They can handle being discharged completely many more times than a normal car battery. So when you’re not using your caravan there is no need to worry about the battery. Just charge it before you go.
2. They can handle a longer use periods.
1. They don’t have the peak or surge power of a normal car battery.
2. They are heavier.
3. They cost more.
My advice. Purchase a deep cycle battery.