Guess I read your first post too quickly, Scott! I read your first post to say: "the widescreen side is single layer, fullscreen is two, though." Instead of "the fullscreen is too, though."
I would be skeptical of the PQ on LMS. My reasoning is that Napoleon Dynamite was in the same boat. The first release of ND was also double sided/single layer. For the 2 disc SE of ND they went with a single sided/double layer and ditched the fullscreen version. IMO the 2 disc had much improved PQ, less ringing and more detail.
One more Costco price for everyone -- $24.09 at my Costco for the new Hogan's Heroes set and the same price for each of Gomer Pyle, USMC and the final season of The Andy Griffith Show.