The worst can happen. I accidently witnessed a family with 4 children arriving at a hotel. The doors of a van opened, and the 3 older kids got out first, looking so very happy to be free again - LOL. Then the mother appeared: all so out of it and loopy. And then 2 year old boy: crying so bad! It looked like he had been crying for a while, and continued crying and screaming all the way through unloading a car, check in... I saw him again crying in his father's arms at the elevator, some 30 min later. The father looked completely stressed out! I felt so sorry for a poor boy and his family.
What helped me is to build a structure of the long day. I divided a day into 4 periods, and planned activities for each period. The division helped me to take one thing at a time and made a day seem shorter. We decided to start as early as possible. We finished loading a car and packed some breakfast while Camilla was still asleep, which helped. Then I took a baby, her cloths, and a bowl of baby cereal with pieces of fresh strawberries in it (Yummy!) straight from the bed to the car seat. The wish was that everybody would have another hour of sleep once in the car.