Man, I had a crazy weekend. It's good to be back online though. :3

I think either way could work out well for us. I think we could have the group wait to attack and make their move come sunrise which may give Prim and Gale a very small window to get out without being seen/triggering traps. But as you suggested they could have to leave during the night, I think either way, there could be a lot of tension and danger to play with. If they did leave during the night, would they relocate in the ruins or want to go out into the woods/field area? If they do leave in the middle of the night and don't deal with traps and manage to avoid the group, we could easily introduce some of the icky bugs and stuff XD