M.M.
Hi there! The fact that your actually asking about it is good! From the sounds of it you're more worried about her being homesick and how much time YOU can stand being away from your daughter!! Think about this from her fathers point of view... He has to deal being away from her all the time! Imagine how you would feel over the summer if she went to stay with him... That's how I'm sure him and his wife feel ALL year!!!
I say if she wants to go let her... Call her every night, though don't expect them to hold their evening waiting for your call! Have you weekends with her and maybe a Wednesday night dinner... If she does say she's homesick don't jump right up and go get her... I know that sounds rough, but that would show that you have no faith that her father can handle things! (this last piece of advice is from my step-childrens counsler!)Just re-assure you're there to talk and she can call when she wants and mention the next time you'll see her! I'm betting though she'll have a blast and enjoy the quality time she gets to spend with her father and his wife!!
As for the money... No you wouldn't have to pay the weekly summer camp fee, but most likely he'll end up spending it on her anyway to do other things... I'm guessing that your daughter w ould be staying home with his wife?? I'm sure she'll gladly put that money to use for other fun activities!! I know I would!! And for the child support being lowered... Most states don't/won't do that unless things are worded just right and the time between the two houses is just so....