A party with a shaman and a bard are navigating an "imperial bureaucracy." Abstracted into one skill challenge, this presents the process of moving from bureaucrat to bureaucrat, meetings over multiple days, and a general "do you get the authority to grant your requests?" This is a wholly sensible goal for a skill challenge. The shaman can grant +wisdom to any skill during the skill challenge, and with a feat grant the bonuses to the whole party. The bard has a similar class feature. These features were obviously intended to be used once per skill challenge, not for every roll.
Are there any rules, guidelines, or blog posts devoted to skill challenges that happen over multiple hours or days which feature rules on short and extended rests during a skill challenge?