I think MOST people on here make a bigger deal out of TB/WP then it actually is.
I think you should be fine driving the car back home and doin that work here...but if you will do it anyways why just not
Take care of it before you get on the road?
A good trusted nsx mechanic can look and feel around and tell you how bad the belt is just by feeling it...grant it he can't take it apart and see if there are minute cracks in it...however giving him some history of where the car has lived most of its life (climate/temp/humidity) and a prodding around should give u some basic ideas.
But always remeber Murphy's law