I used Lidoderm patches for my MP. 2 weeks using those put the nerve back to sleep. I had my MP for over 10 yrs, due to damage of the nerve during a C-section + an exploratory looking for a tumor at the same time.

This thread discusses my old MP -- Lidoderm patches and has links to useful other sites with pictures.
http://neurotalk.psychcentral.com/thread124259.html

The lateral femoral nerve can be damaged in the back (lumbar) or in the abdomen as it exits thru the inguinal canal to go to the thigh.

I did not use drugs for mine, as most of the newer ones like Neurontin/lyrica were not available. I never used opiates either.
Tylenol was a far as I got.

One thing I did notice was that heat really activated that nerve so no hot baths, or steam rooms. I can't last in a steam room more than 5 or so minutes. Also tight clothing is out.

My nerve does not shoot or stab anymore, and my thigh is not numb like it was. But if I overextend the leg getting in or out of the car I can get a light twinge of what was! Recumbent and other bikes tended to set it off too. So I avoid bikes now.

I have had MP for years and don't have any info on the radio frequency ablation for you. I wish you the best with the procedure! I hope you will follow up on the results. I have tried Neurontin & Lyrica with only crazy side effects and not able to tolerate the drugs. Good luck!