First off, congrats on your Son being accepted into the program from a Community College! I've found that it's a bit tougher to be accepted from one since there's not exactly a department that deals with internships.
If I were you I'd just let him accept it. He's obviously had the motivation it takes to complete the entire process, and holding him for 72 more hours may not seem like much but it will switch up the arrival dates for him.
As far as housing/roomates goes, he's probably good with the internet. First, he could look on these boards for a few guys that need roommates, as I'm sure quite a few people will be looking for some in the next few weeks when acceptances come out. Next, I'd suggest Tumblr if he has one, as I know quite a few people match roommate applications on there. There's also a few other sites that I'll leave for you to discover. Last but not least, he could just wait until check-in day and be paired with whomever is left.
You've also got to understand as a parent (who I
hope was once a teenager) that partying is just a part of being young. It's just about being smart with it.
Also, check out this
Roommate thread.
Congrats on your Daughter's interview!
With the DCP Information Meeting you just get to see a powerpoint and get some information on the College Program. It's actually a bit better that she didn't go as she doesn't miss out on much and I've found that things on the internet are a bit more informational from a personal perspective. More or less, there's a few other things that I'd rather not mention.
My best personal tip for the interview is to first show some excitement! They want people that are enthusiastic who can make guest's day Magical! Also, smile while you're doing your interview as you can hear a smile through the phone.
Also, if you're willing to help her out, practice with her over the phone or in person by just having her turn around. Not being able to see someone in person makes a phone interview different than most.
Also a few resources that I've found over time --
1.
Tricky CP Interview Questions
2.
Disney Internships & Programs Blog
Browse around the second blog as there's an actual phone interview page.
Good Luck!
Have a Magical Day!