John,
A fluid analysis of you coolant should answer any question you have about it's serviceability. As you know, replacing the coolant is not cheap and is probably totally unnecessary, so have an analysis ran for about $25 for your records and maintenance scheduling.
Also, if you were 3 quarts low on brake fluid, you should check for excessive pad wear or fluid leaks.
If you are going to a rally for answers to technical questions, you may or may not be disappointed depending on who the other rally attendees are. Some rallies have no technical experts in attendance, while others have a wealth of technical knowledge in attendance like the Quartzsite rally that just ended. Rallies are not normally designed as a place for coach maintenance, but as a social and entertainment event where we normally overeat on good food. If you have technical questions, you should ask them here on the BAC Forum, and go to rallies for enjoyment.
Gerald