I don't know how many kids you have in your group - we had a bunch and they were roomed together. So we printed up a civil code that was given to each kid before any problems presented themselves. You're welcome to adapt it, if you wish:
I have found out that there ain't no surer way to find out whether you like people or hate them than to travel with them." -- Mark Twain
Civil Code 1: You are not responsible for anyone else having a good time anyone who cant have fun at Disneyworld should seek professional help. However, you may not do things that actively interfere with another persons positive experience. This even applies to people we do not know. Examples:
1. Being loud as you walk past other hotel rooms or excessive thumping around if we are not on the ground floor.
2. Making Ruthie, Michaela, or Miss Yvonne feel stupid for liking Its a Small World
3. Being rowdy or obnoxious on rides or in lines.
Civil Code 2: All of the adults on this trip are people we know and trust. You are expected to be respectful and responsive if they give you instructions. However, this many adults means that there is quite a bit of room for contradictory or multiple instructions being given at any time. It is not disrespectful to communicate that your parents have given you permission to do something or that someone else has already asked you to help them with something.
Civil Code 3: We will be spending a lot of time together. We will share small spaces, get tired, and get hot. This is a potential breeding ground for hurt feelings. Please be careful in your teasing. The comment that is taken in fun at home might be taken seriously by a hot, tired, hungry person.
Civil Code 4: Please be responsible for your own belongings. Only take as much into the parks as you are comfortable carrying all day. Our hotel rooms are not large please be sensitive to your roommates comfort and do not spread your belongings everywhere. You may want to store extra spending money or breakable items in your parents room.