Why do you insist on exclusivity?
Sadly there are a lot of scammers who are falsely advertising caravans. Duplicate adverts from different companies make potential renters concerned about the validity of the advert. There is also a high risk of double booking which as well as being inconvenient is not good customer service.
As a company, we also invest a lot of time and money into getting your caravan rented out. We do this in good faith that you will then allow us to book the dates provided, to cover the business running costs and also so we can earn a wage.