My son will 18 this summer and my daughter will be 16. Are there often other teens on these trips? Would one trip be better than another for having teens? Also for the quad rate - this that for 4 people in one room or is it for two rooms or does it depend on the trip? I notice that on some trips the quad rate is less and others it is the same as the double rate. We would need to go in June or July because of school. Would any of the trips be better than others during this time? Would there be any you would recommend not taking during this time?