I met them in Worcester a couple of tours ago. Froze my ass off waiting too. But I got them to sign my BWP booklet, so I'm happy. Each one of them was quite nice - shook my hand, said thanks for coming out, etc. Mikael came out after like 2 hours (it was the last show of the tour). He talked with me and a few other fan-cicles for like 5 minutes (in his fur coat). I thought he was really polite and considerate and it was totally worth it.
But now that he's a big MTV star and on the cover of the magazines, it might be more difficult. It depends on the venue. If you really want to meet them - ask when you get there! At the very least, you'll figure out where the buses are and you can hang out there for awhile.
Good luck!