I froze the smoothies, along with everything else that could be frozen, before we left. I packed them with our frozen water bottles and they stayed frozen for the entire five hour drive. Our little cabin at Mack's Inn had a refrigerator so we put all the cold food away as soon as we arrived. The big smoothies were for me and had spinach, yogurt, and a variety of fruit. The smaller smoothies were for my kids and had milk and fruit. I put the smoothies in the fridge to thaw the night before, but the fridge was too cold so we ended up packing them in the cooler and drinking them for lunches in Yellowstone. I had it figured out by the time we got to the reunion at the May Family Ranch and had them for breakfast there.
We also brought regular cold cereal for my husband and the kids. I brought milk with us since I wasn't sure if we could find a store. It did great surrounded by frozen smoothies.
Here's one of my favorite shots in Yellowstone
By bringing most of our food with us, I was able to control what we were eating. We did have a nice lunch at Mammoth, and my daughter will tell you that her favorite part of the meal was her brownie sundae. She told me about it often enough. I didn't have any dessert and I love brownie sundaes. My favorite part was that poppy seed dressing. I really must find the recipe.
Here's a shot of my whole family in Yellowstone.
This last picture is a place near Mack's Inn called Big Springs. It's beautiful there.