You do realise that your summer is our winter.
I'd suggest you do some research because the P to P trip is very overpriced.
You don't need to do anything to be "invited".
They buy the names of prospective students from a national list service -- the American Student List.
In fact you don't even have to be alive to be invited.
First the parents of two deceased children received letters, now the "parents" of a deceased cat received that same letter from the organization.
http://www.consumeraffairs.com/news04/2006/12/p2p_earl.html
There is information on how it all works at: People To People Student Ambassador Programs. Click the blue.
http://www.ripoffreport.com/reports/0/305/RipOff0305334.htm
You pay your $95 registration fee, go through the interview process and then look at the website for the fund raising ideas. Access to this part of the website is only granted after you pay the $95 dollars and 'pass' the interview. Then you pay another $1000. It seems if you pull out there is no refund and the actual People to People website tells you nothing that is helpful.