I agree right up till you get the RTV out. That's not much better than greasing the joint in the long run. I'd MUCH prefer Loctite 518 or 515 which will actually form a bond between the block and pan. The thin OEM gasket and a light coat of HiTack aerosol would be my first choice.
I don't mean AT ALL to be insulting, but my opinion of RTV is not high at all. In most situations there is a better product that can and should be used.