We routinely eat crickets at my dive bar. They put a bunch of novelty stuff in the vending machine, some of which are boxes of flavored crickets. I like the bacon cheddar ones a lot
Going to Mars won't help with anything other than practice anyway. There's little of value on Mars in terms of colonization except for scientific purposes. Paradoxically, its gravity well is in between being good as a launching point for further exploration and good for colonization (using Luna...