I am planning a surprise family vacation and need some help. 3 families (7-9 people, 3 kids, 4 young adults, 2 active seniors). We will all be coming from different parts of the country and want to spend as much time as possible in the parks. Where should we fly in to? We are thinking of renting an RV so we can all travel together so I would love input on RV and tent camping, as well as lodges. I am guessing that we will have 5 full days in the park. Anyone have any tips or advice they could share?