I worked with them at a festival in 1998. Nancy Wilson wasn't there. Ann Wilson seemed to be in a foul mood and wasn't very nice to their crew and totally ignored the production crew (that's not surprising, happens often). The rest of the band and crew were super friendly and cool. However, when they hit the stage she was magic. They upstaged Foreigner (who were the headliner) by quite a bit. Lou Gramm was recovering from a brain tumor at the time so I should cut them some slack for phoning it in, I suppose. Him and Mick Jones were not on speaking terms I don't think. They asked for separate trailers at opposite ends of the backstage compound. Festival management complied with that but Gramm complained that they were too close anyway.
To their credit though, they were nice to the crew and I had a pretty decent chat with Mick Jones.