So, since the temps at night are getting low, this weekend looks like the last one in the 60s... I'm going to try to do a sudden integration with the kids. I don't have the room to do them separate, and I'm concerned about them being in the dog kennel like I did with the last group, and them being warm enough with just three bodies.
My flock seems to be mostly accepting, not as bad as some stories I've heard, so we'll see what happens. The kids are 8 weeks or so.
ETA My other concern, besides temps, is that I'm not going to be home to watch them until the sun is down each night this weekend. I'm still working the Renaissance Faire (last weekend) so I won't be able to keep an eye on them during the day.