I was in BEAST last year and my parents sent me a package with extra underwear, socks, etc. it wasn't a huge package but it had some extra things I needed. I told my SL that I was expecting a package that had some necessities and when we went to check mail, we would pick up the package together. They briefly looked through it for contraband and then gave it to me. I knew a kid that got a package a good amount of times. (Note: sometimes this depends on your SL, some might let you continue to get packages while others will cut it off after the first one. Don't go crazy with the boxes and don't take advantage by adding snacks or unathorized items. I sent myself some stuff before I arrived and when I went to check for the first time, they were there. Try to use the smallest type of packaging possible so it can fit in or be squished into the PO Box. Large hard boxes have to be picked up at the mail counter and sometimes the workers aren't there which further delays the process of getting the package. Just my advice. but if your DD doesn't want to risk it and is willing to carry a lot, it is really only a day so she should be fine in the end. There really isn't extra attention associated with mail. You really only check it as a squad and unless you're sending grandmas cookies and a homemade sweater, then your SL probably won't harp on it. Again this is just my experience and advice on it but do whatever makes feels comfortable.