(Optional: perhaps more helpful at States)
A theme can be a nice touch at a festival. It can also help tie together decorations, printed materials and concessions. A theme is not, however required. In fact, most Regional Festivals do not have a theme. Many hosts have found that after choosing a theme everything else just falls into place. Design a logo and T‑shirt based on the festival theme.
Decorations are not required but can add a nice welcoming touch to a festival. Most Regional Festivals do not use decorations. Areas to decorate might include the lobby, cafeteria, theater and guest home base rooms. Decorations can become expensive but donations in kind along with a little creativity can go a long way. Also look to the outside of the building for ideas. It sets a good tone to see some thing from the bus as a group arrives.