My family wants to try the CBR. The problem - we are a family of 5 (three kids - 19, 16, 11), the CBR only allows 4 guests/room, we can not afford 2 rooms in a moderate resort. The plan - only register the 16 and 11 year old, buy a single 8-day park hopper pass for the 19 year old and bring along an air mattress. We have already taken into consideration that we will not be able to use the Magical Express transportation service (we are driving) and that we will also not be able to take advantage of the extra magic hours (we don't care - those parks are usually the most crowded on the extra magic hour days - we avoid them anyway). Has anyone else ever done this? Is there anything else that we would miss out on by not registering our 19 year old that I have not thought of? 
