As far as not going in the galley, I guess the one thing we'd need to know is who provisioned the boat? For a fully crewed charter, they do it all. So they know what is needed and if you need a snack or something, they'll get it.

In this case it was a hired chef. If they provisioned though, then they'd know what was needed for meals and what was needed for snacks..etc so just going in and raiding the fridge could impact their meal plan. If the charterers provisioned and had a hand in planning the meals, then that might be different.