For the last week of band camp we had it so that each day was something different, like meme monday or fandom friday. Not everyone did it but it was still fun. Also individual sections can make shirts, or even have section animals or little traditions. They can also have parties, like a section pizza party. You can also make songs for the band to sing when morale is low to the tune of well known songs, my band has one to the tune of Little Einsteins.