I really like the Versalite, but I've accepted the fact that just about everything is going to wet out, either from the outside or inside, and that DWR treatments wear off pretty rapidly and are not to be depended upon. The best thing IMO is to wear whatever layering is necessary to maintain a damp-but-warm condition, which is much easier with pit zips and the front zipper. With these, I can stay reasonably dry (or minimally damp, depending on how you want to look at it
) and also regulate temperature to a large extent. When it's cooler, the key layer is the fleece which provides critical loft even when it is very damp.
I first tried the OR Helium II and IMO the Versalite's fit, zips, hood, pockets, and wrist cuffs beat the crap out of the Helium.
And BTW I'm jealous as heck that you're getting to go to WRR and I'm not, lol! Have a great trip!