Your data model is just a visual or text-based representation of the data that you will need to keep track of to implement your application.
What are the pieces of data?
- Trips, Attractions, Wishlist, etc.
What are the relationships between different pieces of data?
- User has many trips
- Trips have 1 Wishlist
- Trips have many attractions
- etc.
Trip Table
Attraction Table
Wishlist Table (this is referred to as a lookup table)