We got to Big Bend via US Route
90 which runs south of Interstate 10 out of San Antonio; essentially the
same route, but one tenth the traffic and much more interesting.
We
had visions of taking this trip entirely on "blue highways" and avoiding the
interstates altogether. This was before we fully understood the implications
of driving a 12 foot high vehicle that can't be backed up (like at an unexpected
low bridge) without unhooking the car, tying up traffic for half an hour,
and generally being thoroughly embarrassed. The solution? A wonderful
book called "the Professional Drivers Road Atlas" which shows truck routes
(interstates and others) in every state. This allows you to depart
the interstates with some degree of confidence. As I mentioned earlier, there's
nothing like the relief of meeting an 18-wheeler headed in your direction
on an off-the-beaten-track road; you know you can go wherever he's been.