What if the orcs had not captured Merry & Pippin?

[Kuruharan]

Really, you're too kind.

Aragorn has elven blood and Legolas is an elf. I'm wondering if the elven cloaks would have made it impossible for the Ringwraiths to detect their Fea? You know how it's described in the Sil, Feanor and other Elves, such as Glorfindel, appear to Morgoth et.al. as beings of light. Um, Jackson even does a fair rendition of this with Arwen from Frodo's perspective in his FotR movie. What I'm trying to say is, wouldn't Aragorn and Legolas been detected, even with Elven cloaks?

Well, lets run this answer up the flagpole and see if anybody salutes it.

I think that they would not draw attention to themselves in that particular way. All other things being equal, they would probably be able to pass unnoticed just as much as two hobbits. Now if somebody started paying particular attention to them for some reason, they might notice the beings of light aspect.