There certainly are plenty of places to talk to band members. Many of them are very accessible. Some of the bigger ones aren't though.
Going to IV, my wife and I rode the Marta from the airport and these guys get on. I said to my wife, "They've got to be with one of the bands, I just don't know which." They eyed my PPIII shirt and took up positions across the aisle. I didn't talk to them, I because I didn't know who they were. They were talking a different language that I took for one of the scandinavian languages or German. Later we realized it was Emppu, Tuomas, and Marco from Nightwish. Then later we ran into Tarja coming off the elevator in the Grenada. She was with some other people, but I was kinda shocked, so I didn't notice anybody else. It was one of those things where I was trying to figure out if it was her. She's much shorter than she looks up on stage.
Of course, that was shortly before the show, so I didn't bother her.
When Evergrey is there, you will always have a chance to eat breakfast with Michael if you get there about a half hour before breakfast ends. He's a riot. He swears his head off. It makes some of the families eating breakfast a bit put off.
Last year, my wife and I rode the Marta back to the airport standing next to Dreamscape. We didn't bug them though. They appeared to be off to sight see.
In the venue, you can pretty much talk to most of the non-headlining bands. I've talked to Jon Oliva, Urban, Andy Franck, Vanden Plas members, Circle to Circle members, Dreamscape members, etc. Most of them were willing to stand there and chat as long as we wanted. Of course, they might not have been as willing if my wife wasn't there.
.
