We are planning a trip for next May. There are 6 adults and 3 kids, 1 who will be 1.5 yrs, 1 almost 2 and 1 almost 6. We would like to do some RV travel if possible. What I wished to know is whether Europe or the US would be cheaper to travel in. Also I wondered which of the places would be more kid friendly. I would appreciate any feedback.