Unless you are going to hook up with old friends, I don't see the appeal of these rallies.
If you do go to these things, you really need to be the type that can roll with the punches and look at it as an adventure of sorts. Rarely does something go to plan - especially when you are counting on volunteers and not paid employees.
If you are expecting orderliness, courtesy and absolute rules following, then you will obviously be sorely disappointed. Perhaps Kharma is getting hers on some of you.