Series mode is preferred for harmonic tuned UHF due to less sensitive to stray capacitance since low impedance. Choice of amplifier is possible to suit frequency in GHz range using GaAs etc, to improve gain if needed, but the architecture is not limited. Only the ESR of the resonator. Resonator must be larger to get low ESR, since ESR increases with each harmonic.
Thus resonator may be ~1cm instead of few mm. for High Harmonic Resonator.
Yes resonator uses same equivalent circuit with Rs,Cs,Ls,Cp