In my opinion there are few ways to attract the travellers,
In terms of Budget:
You can maintain a package cost which will attract the people who loves to travel within limited budget. You can also include group discount to the people travelling with family. A Customized tour can be organised if the travellers suggest the places they want to visit.
In Terms of Places of Attraction:
You can include some lesser known places/events in your package which can attract the people who love to explore and does not have any budget constraint.
In Terms of Activities:
You can think of a Bonfire dance organised at a night in Shimla or Gangtok or arrange games/fun activities at the seashore of Digha or Neil Island when the sun goes down.