
I recommend creating a core team of those intimately familiar with the grant application, process, and details of the application and then a support team of those who are supportive of the effort and familiar with the project and application, but are not necessarily needed at all meetings or on all email exchanges and draft reviews.
As you are establishing your grant team, it is key to outline what your expectations are for the role of the grant team and how you would like to most effectively utilize the team' members core competencies and resources.