From the Center for Disaster Philanthropy, this article on Long Term Recovery Groups. An excerpt:
The structure of an LTRG will vary depending upon impact of disasters, size of community, number of VOADs in the community, pre-existing strengths of community organizations, etc.; ideally, staff should be hired to run an LTRG or there here should be an organization dedicated to providing backbone support to help call meetings, form agendas, take minutes and enable communications. A fiscal sponsor is also needed to support fund development activities; this could be a community agency or a philanthropic partner.