Yes. Campaign creators are the ones who must manage and coordinate any Leaderboard perks that are offered on the campaign's Leaderboard.
Cajole brokers will coordinate with the campaign's target or their representatives to make sure any information or access needed to fulfill these Leaderboard perks are provided to the campaign creator.
Campaign creators will then communicate with any backers who are owed Leaderboard perks from their campaigns.
Backers are responsible for any costs, including travel, that may be incurred in the act of accepting their Leaderboard perks.