What I said was not clear.  A 9' whip is 1/4 wavelength, which, when you use the proper cable, matches the output impedance of the transmitter.  No tuning is required with a 1/4 wavelength antenna.  Tuning is

 required with most other antennas.

OK, well we're FM here so its a little different.

Here's a tip:

Pawn Shop!

I bought a CB for 20 bucks in 2001 for the 'Melt.  I't had great coverage at the Badlands and on the interstate to and from for 4 years (missed '04).

I use a base-loaded whip (20 bucks from RS) that also doubled as a dayglo orange flagpole (I guess a lot of ORV parks require them so you and the ATVs don't bash into each other). 

Another Tip: 

Take the flag off when not in use.  Wind resistance of the flag caused the whip to break off at the base after 3 years...