I bought my /94 in November /09 and changed TB/WP then. I've had it almost 9 years and put close to 35,000 miles on it. There are two NSX master techs that work exclusively on the car who between them have over 50 years of experience. The /94 maintenance schedule calls for belt replacement at 6 years and a specified mileage (I forget exactly -- could be 60,000 miles, which is well beyond the number of miles I have driven the car). I asked both of these fine gentlemen at the 6 year anniversary of my ownership (car then had been driven 25,000 miles since TB/WP replacement) and they felt it quite safe to use the later years NSX interval which I believe is something along the lines of 8 years/90,000 miles or even go a little beyond the 8 years given the low mileage. Having said the foregoing, the car is driven relatively gently and does not spend a lot of time in VTEC or near redline.
My view is that if you know the car/prior owner and history and car has had an easy life meaning well maintained and although may have been driven in a spirited manner, hasn't been beat on/spent its entire life in VTEC/at redline, chances are it is safe to drive home. On the other hand, if in doubt I would play it safe and either ship car home or have the job done before embarking on a long trip.
One other piece of advice for what it is worth -- when I bought my /94 in Phoenix and drove it home to MI (and yes, I had the belt done in PHX), I looked at the rear tires and since they looked OK with sufficient tread I figured I'd make it home and buy new tires in due course. What I forgot was the melt-away rear tire issue on the NSX especially if the more aggressive (early years) alignment settings were used. Long story short I had an unscheduled stop/layover on way home dealing with the hassle of sourcing new rear tires. Believe me, an NSX with near treadles rear tires in the wet throws a "code brown" alarm. I guess the RE010s on the car were old and probably a bit dry. The alignment setting was aggressive and the road surfaces in AZ and NM were somewhat abrasive. As I was driving through some rain the rear of the car felt quite loose. We stopped for gas and to our horror the tread on the rear tires had almost completely melted away. So, one more thing to check before your trip -- depth of tread, age of tires and would not hurt to make sure that car is properly aligned.
Best of luck.