The "trail" to Lower Boy Scout Lake is not a trail at all, just a well-used path. There was one really heavy storm, but I think it was two years ago. I've not seen any reports other than yours saying the route had been damaged at all.
A summer ascent should be the same as any other year.
Good luck!
Edit: Saw your post elsewhere; here is a fair amount of Mountaineers Route info:
Mountaineers Route info and links
