Dan:
You may be able to see Langford's style at Park Ridge, but -- boy -- it doesn't jump out at you the way a typical Raynor, .e.g., course might. As you say, that's probably a result of the multiple revisions of the course.
I went back and looked at some of Scott Burrough's aerials, and what's clear about Langord/Moreau -- most notably in the wonderful Lawsonia aerial -- is how sparingly he used sand in his designs. I think that's in contrast to some depictions of L/M courses, where large traps appear from the ground to greatly influence shots and shot routing. They appear, from the ground, as these huge, yawning, penal things -- but in reality, they are for the most part fairly narrow and avoidable, given that L/M in general didn't design tight, corridor courses. (Looking at the Lawsonia aerial. e.g., it looks like someone in a trap there can barely fit in the darn thing to take a swing, but in fact they are quite playable.) Contrast that to the current Park Ridge aerial, where the sand traps are expansive, esp. the ones bordering the par 3 in the upper left corner, the ones pinching the fairway (including the U-shaped one) in the middle of the photo, the two very large ones on the par 5 running along the left side of the photo, and the huge one that sort of piddles out into four smaller bunkers on the hole running out from the clubhouse. Granted, I haven't seen a ton of L/M courses, but you could've posted the Riverside aerial without any additional information other than, "This is a golf course; guess who designed it," and I would've immediately said Langford/Moreau.
I think you're right about the pre-2001 work; if Langford was brought in post-Bendelow, I can't imagine him leaving bunkers the way they appear in the current aerial. But, all kinds of unknowable things -- money, construction restraints, membership directives -- could've altered his work there post-Bendelow. (Caveat -- I looked at Wexler's drawings of L/M's Key West course in "Missing Links," and the drawing there does depict less of the linear approach to bunkering that RJ writes about, and more of a style that's found at Park Ridge. But, I'm not sure I trust the drawing -- the aerial picture in the books doesn't provide much clarity about the bunkering on the course.)