The idea that any of these people would want to even show up for a fest, for a show that they get paid nothing for the sale of is a credit to them. IMHO every fan should be extremely grateful that anyone from a show that ended 37 years ago, and pays no royalities, were ever care if they watched or not. And I know many fans are extemely grateful but...
I didn't know they didn't get paid, beyong plane fare and a room which I presume must be included. (I'm sparing eyes from reading whole thread.) Yes, complaining about guests would be almost unforgiveable in that case. I'd even go along with Roger Davis and real estate especially since he must need doctor money right now.
If anyone has complaints for the management, that's something else, they receive fans' money, though there's no profit involved, so I'd complain carefully and respectfully.