College Confidential’s “Dean,” Sally Rubenstone, put together 25 of her best tips. So far, the "25 Tips from the Dean" eBook has helped more than 10K students choose a college, get in, and pay for it. Get your free copy: http://goo.gl/9zDJTM
I don't know about 4-7 week sleep away camps, but I was definitely asked a couple times during interviews about independence and whether my kid had ever attended overnight camps in the past, so it is a consideration.
@zixzax yes, sorry, I should have been more clear. Go to the ones s/he like most when school is in session. Touring schools in the summertime can obviously reveal whether you like the campus, setting and facilities, but tells you nothing about the feel of the school that is so important.