For DVC it's 18, many timeshares have much higher ages. 18 is uncommon for timeshares, I know many that are 21, 23 & 25 for the person checking in. You will be responsible if they cause damage.My 18 yr old son and his two friends want to go to WDW in May. I am not able to join them so wondered if I can book a villa for them using my membership?