We are traveling into Philadelphia (Chestnut Hill area) for my sister's wedding. My son will be turning 4 a week later and will attend the ceremony. Afterwards, him and his two twin cousins (almost 3) will go to a room in the venue (a home). They will have a separate sitter but will all be playing together. We will bring air mattresses so they can attempt to sleep. When the reception ends, we'll pick them up and head to the hotel.