Personally, I wouldn’t worry about other meets unless they are close by. July will allow for viewing of 540 construction - which you still can do in November. If you choose November, I would focus more on 540 construction vs. a one mile stretch of road everyone can drive at their leisure. Plus if advertised enough - a lot of local Raleigh area folks will show up (so I wouldn’t worry about out of state attendance.)
Football games shouldn’t be concerning - 1) no one goes to Duke games 2) Carolina games would be more at Chapel Hill 3) State games - there are plenty of hotels in the area that shouldn’t be a problem.
Brier Creek area is a good meeting point - rather quick to 885 and central enough location for RTP and 540.