If you can take the ingredients with you or find them at a truckstop, this fruit smoothie recipe is a keeper.
1 cup of berries (frozen or fresh, whatever you can get your hands on)
1 single-serving container of low-fat yogurt (can be any flavor you can find)
1/4 cup of ice
Fill a blender (You’ll need an adapter if your blender doesn’t fit the required voltage.) with all the ingredients, and blend until smooth. It really is just that easy.
And, don’t think you need a countertop model blender to accomplish this. Search for “single serve” that are smaller and easy to manage. Also, search for blenders made for camping, and are powered by rechargeable batteries.