We are booked on the Thanksgiving cruise!! This will be our second cruise, but it has been a while since the last one

It is me, DH, DD (13), DD (11), DS (8) and DD (3), all ages at time of cruise. Oh, and my mom!! Since we had to book 2 rooms, I figured why not bring her along, too! So, we have an interior room and a veranda room, both on the 10th deck. Right now, my husband and I are the only ones who know about the cruise. Not sure if we will tell the kids, or when we will tell my mom. Looking forward to it!