It has helped my daughter feel a little more excited about Kindergarten to know another girl who will be in her class. Does your daughter know any of the other kids?
I think it would be good for her to meet the teacher, too. At least, my daughter would want that. She has met her teacher at the school visit, but I'm hoping for another meeting before school actually starts.
A friend of mine had photo necklaces made for her and her daughter. I think the photo was of mom and daughter, and they both wore them on school days. I know that helped her daughter a lot with separation. Oh, and it helped her daughter to be able to bring a stuffed animal to school. Does your daughter have a favorite stuffed friend/doll?
I am so sorry about the camp experience. I know that has to be difficult, since it's coloring how you're viewing the Kindergarten experience. I have had similar experiences with my daughter (she recently freaked out and would NOT stay at the babysitter's house, someone she had met several times and really liked), and my first thought was: How will we survive Kindergarten??
Do you have confidence in the teacher to be able to help with separation? I think that is a big issue. My daughter's teacher has had 30+ years of experience teaching young kids, and I know she's seen it all. I'm still going to be nervous (though I'll try not to let my daughter see it!), but the teacher's confidence will, I think, help me. And, I think you need to expect tears, but not in a worried way. You know? She probably will cry. I know my daughter will. But, when you do discuss K with her you should remind her how well she did in preschool and how proud she was of herself (and you of her). I'll be doing that with my own daughter.
I really feel for you. I know it's hard! I wouldn't bring up the topic with your daughter too far ahead, unless she does. Three weeks is forever in Kid Time. I'm thinking that the week before, I will start gently trying to find out what my daughter's specific worries are so we can make a plan.