We keep the meet schedule and details on our booster club website. Then as information comes in from the coaches or is posted on the host gym website, I update the site with the details. Information can be coming from many different directions and I have parent reps for each level so as different coaches say different things (some are better at communicating info than others), we can consolidate the info.
I try to make sure that hotel, travel, parking, directions, meet info and session times are all posted. We also have a large compulsory group so sometimes they are split between sessions so we try to make sure who is in what session gets posted too.
I will pull info off the website, but always post a warning that people should always trust what their coaches tell them because they have the most accurate and current information.
We have found that having as many details as possible on out BC website keeps the parents from panicking. The HC also knows to check in with me from time to time about when he might know details or delays he knows about. Then I can set expectations with the parents.
The session times and details are hardly ever posted on the host gym website or delivered to the coaches until a week or two before the meet. Sometimes only a couple of days. It is the norm.
I work on organizing our home meet and I know that finalizing sessions and times and what gymnasts go where can take quite a while and the gymnast lists can change dramatically running up to the meet. Think about it, you have an every changing list of say 500+ gymnasts coming from all over the state/country. There is politics, travel arrangements and all kinds of other factors to consider. Complicated stuff with lots of moving parts.