Depending on where you are in NE, Keller still may not be a bad option. I'm in NW and it takes me 15 minutes from the 19th Street NW/Elton Hills exit on 52. Not trying to steer you away from Chester Woods. Based on my light pollution maps, Keller and Chester Woods should be about equal in dark skies.
For those of you who find the 40th Street Exit of US63 more convenient, you can take that west (becomes route 117, I believe) until it intersects with 15. It's only about a mile south from there to Keller. You are "going against the grain" for N-S roads, so you have a few stop signs, but sight lines are pretty good.