So what's 30 minutes? I drive that far too and gasoline is over $200.00 a gallon (my car only gets around 13 mpg). Farther if I go to one of the other tracks. However, I realize that I am lucky and so are the rest of the R/C people because you can pretty much drive any scale R/C car you want within a short distance because of all the tracks. There are also indoor, outdoor, on road and off road. An new indoor dirt track should be opening soon too. One of the farthest track from me is the 1/4 scale track which is 19 miles outside of Las Vegas in Boulder City--Depending on the time of day and where you are coming from, it could be a lengthy drive.
Have you ever considered moving closer to the hobby store?