Y'll know that vega is only 25 lyrs from earth. It's in the Lyra constellation. Also Vega is a polar star, which put in the northing area of the galaxy. How far is it from the outer reached of the galaxy? I don't know. But it probably not that far.
The north ecliptic pole is not the same as galactic north, so even though Vega is relatively close to Polaris, it's pretty close to the galactic equator from our POV. Not only that, but even if it was in the direction of galactic north, 25ly is a small percentage of the thickness of the galaxy, and would still be a long way from the edge.