You can fly there for a couple of days without being in the
competition

http://ozreport.com/2014BigSpringNationals.php

You can come to Big Spring and fly without having to register for the
competition. You don't even have to pay for your aerotows if you seriously help
out with the launch. You can launch before or after the competition launch
period.

Big Spring offers great cross country flying with wide open landing areas, big
soft powerful thermals.

You can come for just a couple of days.

BTW, you can register for the competition and the fee is only $300 if paid
before June 8th.