Personally I am ready to NOT find an entrance at the top in order to keep the group together. And, if that is easier on Rogue I think that's what we should do. There's no reason we can't split up (hit a fork in a tunnel or whatnot) in a little bit if that seems to be the way the story will work best.
If we don't hear from Rogue by day's end (in the story) then I may just throw this in (and hope I don't get in sh**)
......what do you guys think?