Model Congress/ Model UN fall 2017 conferences?

hello, recently came across Princeton model congress via info I received in my Girl’s State delegate packet. After a little research, I found many programs about Model Congress conferences that are held fall/winter. I’m varsity debate and participated in UCLA model UN last summer and had a blast, so I think this is right up my alley. Does anyone have any recommendations or relevant info? Has anyone attended the Harvard, Princeton, or Yale Model Congress? How was it? I’m super booked this summer, so any recommendations would have to take place in the fall/winter. Even though I would love to participate just for fun, of course in the fall (current junior) I will be applying to colleges. So, I would like to hear back whether or not I will be accepted/attending before my apps are due, so I can put it on there. If not, then the conference would have to be free/sponsored/low-cost because my parents are usually unlikely to pay for programs that will not benefit my college desirability factor. Thank you!