New 'dwellers can be shocked at the amount of trash they generate.
The biggest win is to prevent bringing potential trash into your camper in the first place. This might involve:
The trick here is to be ruthless in disposing of trash; always deposit trash when you see an appropriate bin. It's like your dad's advice to always take the opportunity to pee before a road trip.
In order to not to ruin it for everyone, be as neat and discreet as possible. For bonus points pick up litter near the trash bin and deposit it also.