I have just left my barn for another that is closer to my home. More for personal reasons such as time/travel. However, after many years working in barns, I can recommend a few things to you:
1. If they are doing something g one way now, don't expect them to change it for you later. So essentially, what you see is what you get.
2. Lay low and fly under the radar. If anyone starts gossiping to you just stare at them like a deer in the head lights.
3. Leave the barn each day like you'd never even been there. Stelf tactics.
The barn I just left, now this is a different scenario, as I was good friends with the BO, so if I wanted my horse to have another flake of hay I could just give him one (in stelf mode though, so other boarders didn't just start helping themselves ie. two year old receiving a bale a day!!). So I wasn't really at a disadvantage at this barn, and I was apt to speak up to the gossipers and troublemakers......so I was left alone and have many friends there also.
There is drama at barns, from gossips, to stealing, misunderstandings, naughty horses......follow my three rules and you can live drama free while at the barn;)