Just a thought...
Do you think it would be better to lay out the pit tables rotated 90 degrees? Have a main aisle along the edge of the track then have pit "bays" perpendicular to the main aisle. That way people wouldn't have to be banging through chairs and people to get to their pit space.
I'll try to draw a picture:
end of track
main asile
| || || || || < pit tables arranged this way
| || || || ||
metal junk storage