Never tried witchetty grubs the few times I was in Australia, but we're all down with eating aquatic arthropods (shrimp, crab, lobster,...) so terrestrial ones are probably fine if cooked properly as well.
I have ate grubs, fried in butter. Nutty taste. Same with hoppers - You knock the head off, pull off the legs and wings and fry what's left. Pretty good.
But up in here, you'll spend more energy catching bugs than they're worth. If there's a decent way to trap them, I don't know it. So it is more a novelty than a food source.
The intent was toward survival - Worst case scenario practice, so you are used to it before the trauma of a survival situation... With a little bit of living off the land thrown in... Purposefully putting myself into survival mode. But at least up here, it's really not a decent source. Way less energy for way more return to go after something else. Without any weapons, that's gonna be fish first, and then coons, or maybe porcupine, or maybe a marten... and then maybe beaver and coyote, which are more return, but harder to do from nothing.
Anything smaller than that can be done - trapping a packrat for instance - but not really. You get into small rodents, it just ain't worth it. and certainly not bugs.
