A note about substitutions: You can replace the whey with casein protein, but you'd probably need less coconut flour (or more strawberries). I don't think vegan proteins would work well here.
The macros for plain truffles (no chocolate coating) are:
Prot: 6g, Carbs: 4g (1g fiber, 2g sugar), Fat: 1g, Cal: 44
Plain truffles would carry well (wrap in parchment and then in a ziplock, or in a small container).