The organisation will publish a survey showing that more than a fifth of people would like to see Prince Charles and Camilla Parker Bowles lying in a confined space with rats crawling over them to raise money for their chosen cause.
The survey kicks off Leonard Cheshire Week, from 4-12 June, during which the public are invited to take part in fundraising events.
It aims to demonstrate the charity's ethos that 'it doesn't matter what you do so long as it raises money'.
The move comes as the organisation prepares to embark on its first PR drive to recruit extra volunteers.
The charity's annual awareness week partly coincides with National Volunteers Week (1-7 June) this year.