Have a look at the Carnival Arts website, the UK Centre for Carnival Arts. The Resources section has a number of useful briefings and guidance sheets.

UK Centre for Carnival Arts
http://www.carnivalarts.org.uk/resources
Visti the Carnival Arts website has an extensive resources section aimed at carnival organisers, including the following guides available through their website:

A work plan, costume preparation and communication in the band.pdf

Budget template.pdf

Carnival costume and masks.pdf

Hiring Sound Systems and Trucks

Carnival Floats.pdf

Liaison with Carnival Organisers

Steelpan.pdf

Samba.pdf