Normal
Yes you can put your son and his friend on your card. I have done this when taking my childen and their fiances. Even tho we girls had a room and the guys had a seperate room everything was still on my one cc. Just tell them when you check in. Am taking my daughter and sil over Xmas this year for college graduation present and I will have a cabin and so will they with my card for all 3 of us.