The two points of impedance provided by Freescale should be fine for tuning the 2nd harmonic traps. The reason of harmonic tuned technique is to find the optimum device harmonic terminations (usually up to third harmonic) to improve the fundamental output voltage, increasing in this way the PA performance as output power, gain, efficiency, and ruggedness.
The 2nd harmonic trap could be series LC, or stubs. At higher frequencies preferable is the open stub, quarter-wavelength transmission line at 2nd harmonic, which provides about 10% bandwidth at 2nd harmonic (BW depending by layout and PCB material).
Tuning the harmonic traps should be done in the same time when tuning the in/out impedances, checking all the time if PA parameters are still ok.
As a tip, tuning the 2nd harmonic trap for best fundamental efficiency (PAE), could be also the the best impedance point getting good ruggedness due to reflected 2nd harmonic. This in case the PCB layout doesn't have unpredictable mistakes.