Yes, HC-110 is much more like D-76. You might even consider making the "stock solution", if the trip is only 40 days, that's under it's lifetime. Makes measuring a lot easier. Although the children's medicine dosing syringe method or measuring syrup works well.
Note that some places in the US and Canada have awfully hard mineralized water, so pick up a gallon of distilled water periodically, and use it for final washing and the Photo-Flo rinse, or you'll get horrible crud on your negatives.