OP here: We got back from our trip Tues and all went really well. She was great on the way down probably because she was so excited to see Grandma and Grandpa that all requests were complied with willingly. The way back was a little tougher as trips to Grandma's can be action-packed and grueling so she was tired. But I only had to remind her a couple of times to use a quieter voice and once to not put her feet on the seat in front of her. We don't do that in Grandpa's car or on the airplane. I feel so fortunate to have a happy flyer so we can continue these visits as often as possible. Unfortunately, this morning as we got ready for school it was back to business as usual.