Traffic varies widely. CSX tends to run trains after Amtrak goes by. For example, it's not unusual to find a westbound sitting between Prince and Quinnimont waiting on #50 on Sundays. Lately, there have been a fair amount of grain trains interspersed with usual coal traffic.
Trackside not a whole lot. Try Beckley or Fayetteville - not sure what your price range is, though; Beckley has a wider variety of accommodations and price ranges. You doubtless know this already, but avoid the area (if at all possible)on Bridge Day.
Hope this helps
Work safe