Thanks for the suggestions.
I have read,, and re-read now the documentation and I do the things it is describing (checking to see if the user is associated and network authenticated and looking at the load of the AP).
I do have a few questions about the subjective terms it uses in some parts and hopefully someone can answer. In the document figure 4; what would be 'unusually high' usage. On the last page it says to check error and retry rates to see if they are high (and I really want to), but what is high? Is this a percent versus total frames or just the number of frames. Getting that percent versus total frames would be useful.
My network environment is a university campus so we have access points with sometimes no load, and other times a very high association count but only a few active users, or a very high load. Issue reporting is spotty, in areas where I know we need upgrades it is easy to identify RF coverage and capacity issues. But for the upgraded buildings designed for high density of users, knowing how to interpret more of the data airwave is showing to me would be very useful in identifying problems and making appropriate changes.