Crew Camp is a great start..I presume she will have some opportunity to meet with current Midshipmen. If that's the case, she should take every opportunity to talk with them...Midshipmen usually love to talk about USNA !
There is lots of great information on-line, including this Forum, but I would caution that you should be cautious about relying on information that comes from other than Official Sources like USNA.edu.
You should also consider reaching out to talk to your local Blue & Gold Officer. Blue & Gold Officers are essentially field representatives for the Admissions Office, responsible for promoting awareness of USNA and the Admissions process. (The BGO also interviews Candidates as part of the Admissions process). BGO's are not recruiters --- I will encourage interested and motivated candidates, and am always happy to talk to parents that have reservations, but I make a point to paint the whole picture.
If your school doesn't have a BGO assigned (or the Guidance Office doesn't know who their BGO is), there is a list of Area Coordinators at USNA.EDU, You can contact him/her and they will tell you who your local BGO is.
I would encourage DD to do their own research using the sources above before contacting the BGO. It is much more effective to call with specific questions rather than the broad "tell me about USNA." First impressions count, and that BGO may be doing a formal interview 3 years from now, so being prepared with a little knowledge is well received.