Looking at the map, it seems Wiglaff wants to head straight to room 28, wedge in his timber, tie a rope around the staff, and pull it out. Them, I guess you decide where to go next
We have a marching order, so if people want to fill in their purchases later, no reason we couldn't get started
About scouting ahead...Light source! If you have one, your pseudo-invisibility will be ruined. If you don't have one, you can't see.
I did some experimenting with dark corridors and light sources, and came up with the following rule that is actually a bit generous: you can go up to 30 feet from the light source, and see another 30 feet dimly, but not likely to notice much except movement and large shapes. The dog may help in sensing stuff
I am going to make the dog a 1 HD animal, as he is there for snooping, hunting, pointing, not a fearsome 2 HD guard dog.