I would check with Johnston county on the schools listed for that area. River Dell is where my kids go and we LOVE LOVE LOVE this school (mostly due to a fabulous principal) but there's a new elementary going in the area that cover Glen Laurel...Powatan or something like that. Knolls @ the Neuse might go there. Plus, there's a new Middle school in Archer Lodge (opened last fall) so that area might now be redistricted to that school. AND they are planning a new high school in the Archer Lodge area to open around 2010, I think.
All info that might play into your decisions on where to buy. Maybe the county website will have more info or you can call the school district;
Johnston County - North Carolina
Good luck!
Lauren