It's all relative.
It's been estimated, based on the background luminosity of the universe, that 50% of all the stars in the universe are not bound by galaxies. They drift between galaxies, each one isolated from its nearest neighbors by thousands of light years.
The night sky on a planet orbiting such a star would be basically black. The only points of light would be the other planets in their own solar system, there'd be no "fixed stars" visible to the naked eye. The nearest stars would likely be small M- or K-class stars, invisible at those ranges. If they happened to be somewhat close to a galaxy it might be faintly visible as a cloud or smudge in the night sky, like how Andromeda is visible. Human-like beings living there wouldn't know other stars were a thing at all until telescopes were invented and wouldn't know that those faint smudges were galaxies consisting of hundreds of billions of stars until modern telescopes were invented.
Those are the actual suburbs of the universe.
If you want to get to the boonies, though, the real wildernesses, you need to go to the Voids. These are the "bubbles" in the cosmic web, the regions of the universe that have almost no matter in them whatsoever. They're so low-density that according to some theories the difference in gravitational potential has allowed time to pass more quickly there, so that out in the middle of a galactic supervoid the universe is about 18.7 billion years old rather than the 14.7 billion years it's been down where we are in the thick of things. But despite their incredibly low density, there are still a handful of void galaxies out there. And if there are void galaxies, there are likely intergalactic stars that were ejected from those void galaxies as well. There wouldn't be as many such ejection events though, since that's mostly driven by intergalactic collisions, so the few void stars wouldn't even have as many nearby neighbors as the intergalactic stars in our dense neck of the woods.
People who evolved orbiting one of those stars wouldn't know that other galaxies existed until their equivalent of the 1960s - assuming they bothered with astronomy at all.