Trust me I know the NA side of the sport can easily be accomplished by yourself. Even the added pit work I'm sure I could handle but as others have added about good plug reading with nitrous requiring towing to and from the lanes. I take pride in being able to handle every job from the shop to the track by myself. I swear I enjoy that side of it more than driving.
Any plug reading should be done at the end of the
shut down or tow back... I have pulled many a plug
at the shut down(coasted to a safe area that most
guys are doing the same thing).. I carried the tools
with me on the pass in a canvas bag that straps in
place
EDIT
I take my golf cart with me all the time so if I
can get someone to drag me back I will.. let the
engine cool a bit then pull the plugs
