I do think that Regina just meant it was her and Rumpel against the people of Hyperion Heights. I don’t think she was talking about Storybrooke there.
I, also, think there is no real explanation for why they can’t reach out to Storybrooke, except all of those actors don’t want to be on the show anymore. If they create some explanation, it is not going to be great. It is probably going to come back to people could die if the curse breaks, because the curse is keeping them alive somehow, by keeping them in some sort of stasis. I think they should have them all be trapped in a storybook somehow, but honestly, who knows. This probably just comes down to making Regina stupid because they have to keep those characters out.